Grupo Aeroportuario del Centro Norte, S.A.B. de C.V. (OMAB) 20-F 30 Apr 18 2017 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2017shares
Entity Registrant Name	Central North Airport Group
Entity Central Index Key	1,378,239
Document Type	20-F
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Series B Class I
Entity Common Stock, Shares Outstanding	344,004,973
Series BB Class I
Entity Common Stock, Shares Outstanding	49,766,000

Consolidated Statements of Fina

Consolidated Statements of Financial Position $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Assets:
Cash and cash equivalents	$ 118,214	$ 2,333,007	$ 3,005,792	$ 2,605,196
Other investments held to maturity	2,500	49,338		60,445
Accounts receivable, net	31,961	630,757	714,130	390,785
Recoverable taxes	6,598	130,205	104,114	92,531
Repayments for constructions to related parties	4,967	98,017	46,032	1,110
Repayments for contractors	11,068	218,442	199,486	36,683
Other accounts receivable and prepaid expenses	1,969	38,856	28,905	30,024
Total current assets	177,277	3,498,622	4,098,459	3,216,774
Non-current assets:
Property, leasehold improvements and equipment, net	131,814	2,601,397	2,444,205	2,370,975
Investment in airport concessions, net	387,548	7,648,417	6,513,514	6,348,605
Other assets, net	5,286	104,330	109,042	110,722
Deferred income taxes	17,635	348,034	380,103	463,260
Total non-current assets	542,283	10,702,178	9,446,864	9,293,562
Total assets	719,560	14,200,800	13,545,323	12,510,336
Current liabilities:
Current portion of long-term debt	2,577	50,852	56,122	55,433
Current major maintenance provision	11,788	232,645	160,607	220,410
Trade accounts payable	12,971	255,982	262,073	253,358
Payable taxes and other accrued expenses	22,030	434,772	489,201	372,060
Accounts payable to related parties	6,588	130,022	140,328	67,521
Total current liabilities	55,954	1,104,273	1,108,331	968,782
Non-current liabilities:
Long-term debt	232,193	4,582,420	4,637,743	4,658,349
Major maintenance provision	31,668	624,979	509,046	383,293
Guarantee deposits	15,424	304,395	272,511	241,923
Labor obligations	6,459	127,479	111,921	106,414
Other long-term liabilities	1,564	30,858
Deferred income taxes	9,986	197,081	218,791	201,048
Total non-current liabilities	297,294	5,867,212	5,750,012	5,591,027
Total liabilities	353,248	6,971,485	6,858,343	6,559,809
Commitment and contingencies
Shareholders’ equity
Common stock	15,373	303,394	303,644	302,398
Additional paid-in capital	1,509	29,786	29,786	29,786
Total Contributed capital	16,882	333,180	333,430	332,184
Reserve for repurchase of shares	74,284	1,466,016	1,383,124	1,041
Retained earnings	267,624	5,281,662	4,846,045	5,546,458
Accumulated other comprehensive income	(557)	(10,991)	(8,052)	(10,525)
Total Earned capital	341,351	6,736,687	6,221,117	5,536,974
Controlling interest	358,233	7,069,867	6,554,547	5,869,158
Non-controlling interest	8,079	159,448	132,433	81,369
Total shareholders’ equity	366,312	7,229,315	6,686,980	5,950,527
Total liabilities and shareholders’ equity	$ 719,560	$ 14,200,800	$ 13,545,323	$ 12,510,336

Consolidated Statements of Inco

Consolidated Statements of Income and Other Comprehensive Income $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2017MXN ($)$ / sharesshares	Dec. 31, 2016MXN ($)$ / sharesshares	Dec. 31, 2015MXN ($)$ / sharesshares
Revenues:
Aeronautical services	$ 220,266	$ 4,347,031	$ 3,872,735	$ 3,033,130
Non-aeronautical services	73,793	1,456,338	1,332,762	1,111,541
Construction services	67,212	1,326,458	344,772	347,988
Total revenues	361,271	7,129,827	5,550,269	4,492,659
Operating costs and expenses:
Cost of services, excluding depreciation and amortization	49,711	981,065	900,141	836,133
Major maintenance provision	14,747	291,038	262,871	174,293
Cost of construction	67,212	1,326,458	344,772	347,988
Administrative expenses	29,790	587,917	642,345	558,222
Right to use airport facilities	13,748	271,331	244,215	209,771
Technical assistance fees	6,844	135,074	117,987	97,818
Depreciation and amortization	15,161	299,205	276,634	238,809
Other income, net	(70)	(1,380)	(22,250)	(6,930)
Total operating costs and expenses	197,143	3,890,708	2,766,715	2,456,104
Operating income	164,128	3,239,119	2,783,554	2,036,555
Interest expense	17,878	352,822	330,694	334,764
Interest income	(6,450)	(127,290)	(199,600)	(80,740)
Exchange loss, net	3,196	63,072	29,177	33,784
Total non-operating loss	14,624	288,604	160,271	287,808
Income before income taxes	149,504	2,950,515	2,623,283	1,748,747
Income tax expense	41,199	813,073	746,782	512,110
Consolidated net income for the year	108,305	2,137,442	1,876,501	1,236,637
Items that will not be subsequently reclassified to profit or loss:
Actuarial (loss) gain on labor obligations	(213)	(4,199)	3,533	(1,286)
Income tax relating to actuarial loss (gain) on labor obligations	64	1,260	(1,060)	386
Total other comprehensive (loss) income	(149)	(2,939)	2,473	(900)
Total comprehensive income for the year	108,156	2,134,503	1,878,974	1,235,737
Consolidated net income attributable to:
Controlling interest	107,805	2,127,576	1,870,187	1,233,772
Non-controlling interest	500	9,866	6,314	2,865
Comprehensive income attributable to:
Controlling interest	107,656	2,124,637	1,872,660	1,232,872
Non-controlling interest	$ 500	$ 9,866	$ 6,314	$ 2,865
Basic and diluted earnings per share of controlling interest | (per share)	$ 0.27385	$ 5.4046	$ 4.7614	$ 3.1328
Weighted average shares outstanding	393,660,889	393,660,889	392,784,322	393,826,266

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders’ Equity $ in Thousands, $ in Thousands	Common stockMXN ($)	Additional paid-in capitalMXN ($)	Total contributed capitalMXN ($)	Reserve for repurchase of sharesMXN ($)	Retained earningsMXN ($)	Accumulated other comprehensive incomeMXN ($)	Total earned capitalMXN ($)	Total controlling interestMXN ($)	Total non-controlling interestMXN ($)	USD ($)shares	MXN ($)shares
Balances at Dec. 31, 2014	$ 1,491,023	$ 29,786	$ 1,520,809	$ 241,543	$ 4,312,686	$ (9,625)	$ 4,544,604	$ 6,065,413	$ 51,190		$ 6,116,603
Balances (in shares) at Dec. 31, 2014 | shares										395,379,850	395,379,850
Decrease in common stock (Ps. 3.00 per share)	(1,200,000)		(1,200,000)					(1,200,000)			$ (1,200,000)
Repurchase of shares, net	11,375		11,375	(240,502)			(240,502)	(229,127)			$ (229,127)
Repurchase of shares, net (in shares) | shares										(3,223,473)	(3,223,473)
Increase in a non-controlling interest									27,314		$ 27,314
Consolidated comprehensive income					1,233,772	(900)	1,232,872	1,232,872	2,865		1,235,737
Balances at Dec. 31, 2015	302,398	29,786	332,184	1,041	5,546,458	(10,525)	5,536,974	5,869,158	81,369		$ 5,950,527
Balances (in shares) at Dec. 31, 2015 | shares										392,156,377	392,156,377
Increase in a non-controlling interest									44,750		$ 44,750
Consolidated comprehensive income					1,870,187	2,473	1,872,660	1,872,660	6,314		1,878,974
Issuance of shares, net	1,246		1,246	183,124			183,124	184,370			$ 184,370
Issuance of shares, net (in shares) | shares										1,614,596	1,614,596
Dividend paid					(1,371,641)		(1,371,641)	(1,371,641)			$ (1,371,641)
Increase in reserve for repurchase of shares				1,198,959	(1,198,959)
Balances at Dec. 31, 2016	303,644	29,786	333,430	1,383,124	4,846,045	(8,052)	6,221,117	6,554,547	132,433		$ 6,686,980
Balances (in shares) at Dec. 31, 2016 | shares										393,770,973	393,770,973
Repurchase of shares, net	(250)		(250)	(33,984)			(33,984)	(34,234)			$ (34,234)
Repurchase of shares, net (in shares) | shares										(324,507)	(324,507)
Increase in a non-controlling interest									17,149		$ 17,149
Consolidated comprehensive income					2,127,576	(2,939)	2,124,637	2,124,637	9,866	$ 108,156	2,134,503
Dividend paid					(1,575,083)		(1,575,083)	(1,575,083)			(1,575,083)
Increase in reserve for repurchase of shares				116,876	(116,876)						116,875
Balances at Dec. 31, 2017	$ 303,394	$ 29,786	$ 333,180	$ 1,466,016	$ 5,281,662	$ (10,991)	$ 6,736,687	$ 7,069,867	$ 159,448	$ 366,312	$ 7,229,315
Balances (in shares) at Dec. 31, 2017 | shares										393,446,466	393,446,466

Consolidated Statements of Cha5

Consolidated Statements of Changes in Shareholders’ Equity (Parenthetical) - $ / shares	Apr. 23, 2015	Dec. 31, 2015
Consolidated Statements of Changes in Shareholders’ Equity
Decrease in common stock (per share)	$ 3	$ 3

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Cash flows from operating activities:
Income before income taxes	$ 149,504	$ 2,950,515	$ 2,623,283	$ 1,748,747
Adjustments for:
Depreciation and amortization	15,160	299,192	276,634	238,809
Major maintenance provision	14,747	291,038	262,871	174,293
Increase (decrease) in allowance for doubtful accounts	(535)	(10,561)	749	(1,103)
(Gain) loss on sale of property and equipment	(68)	(1,340)	(22,250)	(140)
Present value of major maintenance provision	(278)	(5,477)	(94,072)	8,268
Interest income	(6,172)	(121,813)	(105,528)	(80,740)
Interest expense	17,878	352,822	330,694	326,496
Unrealized exchange rate fluctuation	3,063	60,458	36,791	40,122
Profit (loss) after adjustments	193,299	3,814,834	3,309,172	2,454,752
Trade accounts receivable	4,760	93,934	(324,094)	(69,792)
Recoverable tax	(1,322)	(26,091)	13,773	60,296
Other accounts receivable and prepaid expenses	110	2,195	15,567	(17,502)
Trade accounts payable	(635)	(12,536)	(72,352)	15,143
Payable taxes and other accrued expenses	(691)	(13,628)	24,274	(41,231)
Income taxes paid	(42,055)	(829,973)	(582,986)	(308,223)
Related parties, net	(3,849)	(75,966)	72,807	(3,867)
Major maintenance provision	(4,955)	(97,784)	(102,854)	(171,647)
Guarantee deposits and labor obligations	3,362	66,348	32,839	151,402
Net cash flows from operating activities	148,024	2,921,333	2,386,146	2,069,331
Cash flows by investment activities:
Acquisition of property improvements	(11,237)	(221,773)	(120,390)	(134,071)
Other non-current assets	(1,090)	(21,519)	(47,531)	(51,701)
Proceeds from sale of property and equipment	68	1,340	30,892	274
Acquisition of improvements in concessioned assets	(69,356)	(1,368,770)	(494,915)	(321,206)
Other investments held to maturity	(2,500)	(49,338)	60,445	(60,445)
Interest received	5,943	117,284	100,142	73,914
Net cash flows used by investing activities	(78,172)	(1,542,776)	(471,357)	(493,235)
Cash flow from financing activities:
Cash received from debt financing and debt securities	745	14,700
Payment of long-term debt	(2,593)	(51,168)	(58,875)	(52,765)
Interest paid	(17,760)	(350,499)	(312,796)	(324,471)
Capital reduction				(1,184,834)
Dividends paid	(79,810)	(1,575,083)	(1,371,642)
Issuance (repurchase) of shares	(1,735)	(34,234)	184,370	(244,293)
Increase in non-controlling interest	869	17,149	44,750	27,314
Net cash used by financing activities	(100,284)	(1,979,135)	(1,514,193)	(1,779,049)
Net increase (decrease) in cash and cash equivalents	(30,432)	(600,578)	400,596	(202,953)
Effects of exchange rate changes on the foreign currency	(3,659)	(72,207)
Cash and cash equivalents at the beginning of the year	152,305	3,005,792	2,605,196	2,808,149
Cash and cash equivalents at the end of the year	118,214	2,333,007	3,005,792	2,605,196
Non cash investing activities which are not reflected in the consolidated statements of cash flows:
Acquisition of property, leasehold improvements and equipment, including finance lease	2,589	51,099	41,761	4,032
Acquisition of other assets	227	4,484
Acquisition of improvements in concessioned assets	$ 3,779	$ 74,586	$ 70,268	$ 44,693

Nature of business operations

Nature of business operations	12 Months Ended
	Dec. 31, 2017
Nature of business operations
Nature of business operations	1. Nature of business operations Grupo Aeroportuario del Centro Norte, S. A. B. de C. V. (“GACN” or collectively with its subsidiaries, the “Company”), is a direct subsidiary of Controladora de Operaciones de Infraestructura, S.A. de C.V. (“CONOISA”) and indirect subsidiary of Empresas ICA, S. A. B. de C.V. (“Empresas ICA”), the ultimate parent company. GACN is a holding company, whose subsidiaries are engaged in the administration, operation, and use of 13 airports under a concession granted by the Mexican Government through the Ministry of Communications and Transportation. The airports are located in the following cities: Monterrey, Acapulco, Mazatlán, Zihuatanejo, Ciudad Juárez, Reynosa, Chihuahua, Culiacán, Durango, San Luis Potosí, Tampico, .Torreón, and Zacatecas. The Company also generates revenue from hotel services provided by Consorcio Grupo Hotelero T2, S.A. de C.V. (the Terminal 2 NH Hotel) and Consorcio Hotelero Aeropuerto Monterrey, S.A.P.I. de C.V. (the Hilton Garden Inn Hotel), located at Terminal 2 of the Mexico City International Airport and at Miguel Alemán Km. 24 SN, Apodaca, Nuevo León, respectively. The address of the Company’s corporate office is Lázaro Cárdenas #2225 5 th Floor, Valle Oriente, San Pedro Garza García, Nuevo León, Zip Code 66269.

Significant events

Significant events	12 Months Ended
	Dec. 31, 2017
Significant events
Significant events	2. Significant events a. GACN’s Annual Shareholders’ Meeting approves Ps. 1,600 million dividend payment At the Annual Shareholders’ Meeting held on April 28, 2017 the shareholders approved the payment of a cash dividend of Ps.1,600 million, to be paid in a single installment of Ps. 4 per share. The dividend was paid on May 16, 2017, for Ps. 1,575,083, corresponding to the shares outstanding. In addition, the shareholders approved a share repurchase reserve of Ps. 1,500 million and authorized use of up to that amount to repurchase shares during 2017 and until the next annual meeting approves the 2017 results. The reserve created in 2017 was in the amount of Ps. 116,875. b. GACN’s Extraordinary Shareholders’ Meeting approves cancellation of 6.2 million Series B shares At the General Extraordinary Shareholders’ Meeting held on May 31, 2017, the shareholders approved the cancellation of 6,229,027 Series B shares, reducing the minimum fixed portion of the Company’s capital stock. c. GACN was included in the Dow Jones Sustainability Index for the second consecutive year For the second consecutive year, GACN has been included in the Dow Jones Sustainability Emerging Markets Index (DJSI). The index represents the highest standard for corporate sustainability based on economic, environmental, social and corporate governance criteria. d. GACN launches the OMA Foundation On October 12, 2017, GACN, publicly identified as “OMA”, launched the OMA Foundation, as a platform to promote and consolidate community projects, working with civil society organizations and social entrepreneurs. The OMA Foundation is supporting programs focused on developing technical skills, improving physical education infrastructure and equipment and providing scholarships that help Mexican youth stay in school and develop professional skills.

Basis of presentation and conso

Basis of presentation and consolidation	12 Months Ended
	Dec. 31, 2017
Basis of presentation and consolidation
Basis of presentation and consolidation	3. Basis of presentation and consolidation a. Statement of compliance The consolidated financial statements have been prepared in accordance with International Financial Reporting Standards (IFRS), including amendments and interpretations, as issued by the International Accounting Standards Board (IASB). b. Consolidated statement of financial position According to the requirements of the Mexican National Banking and Securities Commission ( Comisión Nacional Bancaria y de Valores ), GACN must present as part of its basic consolidated financial statements, a third statement of financial position. c. Basis of preparation The consolidated financial statements have been prepared on the historical cost basis; notwithstanding, fair value is disclosed in certain cases. In addition, the Company determines the fair value of certain financial instruments for disclosures purposes. i) Historical cost Historical cost is generally based on the fair value of the consideration given in exchange for goods and services. ii) Fair value Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date, regardless of whether that price is directly observable or estimated using another valuation technique. In estimating the fair value of an asset or a liability, the Company takes into account the characteristics of the asset or liability, if market participants would take those characteristics into account when pricing the asset or liability at the measurement date. Fair value for measurement and/or disclosure purposes in these consolidated financial statements is determined on such a basis, except for share-based payment transactions that are within the scope IAS 17, (Leases), and valuations that have some similarities to fair value but are not fair value, such as the value in use in IAS 36 (Impairment of Assets). In addition, for financial reporting purposes, fair value measurements are categorized into Level 1, 2 or 3 based on the degree to which the inputs to the fair value measurements are observable and the significance of the inputs to the fair value measurement in its entirety, which are described as follows: Level 1: inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company can access at the measurement date; Level 2: inputs are inputs, other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly; and Level 3: inputs are unobservable inputs for the asset or liability. d. Convenience translation Solely for convenience of readers, peso amounts included in the consolidated financial statements as of December 31, 2017 and for the year then ended have been translated into U.S. dollar amounts at the exchange rate of Ps. 19.7354 pesos per U.S. dollar, as published by Banco de México, S.A. Such translation should not be construed as a representation that the Mexican peso amounts have been, could have been or could, in the future, be converted into U.S. dollars at such rate or any other rate. e. Reporting currency The Mexican peso, legal currency of the United Mexican States is the currency in which the consolidated financial statements are presented. Transactions in currencies other than the peso are recorded in accordance with established policies described in note 4 b. f. Consolidated statements of income and other comprehensive income The Company chose to present the consolidated statement of income and other comprehensive income in a single statement, as well as presenting operating income in such statement in accordance with practices in the industry. Costs and expenses were classified according to their nature. g. Statement of Cash Flows The Company presents the cash flows from operating activities using the indirect method, in which the profit or loss is adjusted to reflect the effect of transactions that do not require cash flow, including those associated with investment or financing activities. h. Principles of consolidation The consolidated financial statements incorporate the financial statements of GACN and its subsidiaries. Control is achieved when GACN or its subsidiaries: · Have power over the investee; · Are exposed, or have rights, to variable returns from involvement with the investee; and · Have the ability to use their power to affect their returns. The Company reassesses whether or not it controls an investee if facts and circumstances indicate that there are changes to one or more of the three elements of control listed above. When the Company has less than a majority of the voting rights of an investee, it has power over the investee when the voting rights are sufficient to give it the practical ability to direct the relevant activities of the investee unilaterally. The Company considers all relevant facts and circumstances in assessing whether or not the Company’s voting rights in an investee are sufficient to give it power, including: · The percentage of the Company’s holding of voting rights relative to the percentage and dispersion of holdings of the other vote holders; · Potential voting rights held by the Company, other vote holders or other parties; · Rights arising from other contractual arrangements; and · Any additional facts and circumstances that indicate that the Company has, or does not have, the current ability to direct the relevant activities at the time that decisions need to be made, including voting patterns at previous shareholders’ meetings. Consolidation of a subsidiary begins when the Company obtains control over the subsidiary and ceases when the Company loses control of the subsidiary. Specifically, income and expenses of a subsidiary acquired or disposed of during the year are included in the consolidated statement of income and other comprehensive income from the date the Company gains control until the date when the Company ceases to control the subsidiary. The income and each component of other comprehensive income are attributed to the Company’s owners and to the non-controlling interests. The non-controlling interests in equity of subsidiaries are presented separately as non-controlling interests in the consolidated statements of financial position, within the shareholders’ equity section, and the consolidated statements of income and other comprehensive income. The financial statements of companies that are included in the consolidation are prepared as of December 31 of each year. All intra-group transactions, balances, income and expenses are eliminated in full on consolidation. Note 11 sets forth the entities that are consolidated on the financial statements and the information related thereto.

Significant accounting policies

Significant accounting policies	12 Months Ended
	Dec. 31, 2017
Significant accounting policies
Significant accounting policies	4. Significant accounting policies The consolidated financial statements are prepared in accordance with IFRS. Preparation of financial statements under IFRS requires the Company’s management to make certain estimates and use assumptions to value certain of the items in the consolidated financial statements as well as their related disclosures required therein. The areas with a high degree of judgment and complexity or areas where assumptions and estimates are significant in the consolidated financial statements are described in note 5. The estimates are based on information available at the time the estimates are made, as well as the best knowledge and judgment of management based on experience and current events. However, actual results could differ from those estimates. The Company has implemented control procedures to ensure that its accounting policies are appropriate and are properly applied. Although actual results may differ from those estimates, the Company’s management believes that the estimates and assumptions used were adequate under the circumstances. Adoption of International Financial Reporting Standards The consolidation requirements, accounting policies and valuation methods used in preparing the consolidated financial statements as of and for the year ended December 31, 2017 were the same as those applied in the consolidated financial statements for 2016 and 2015, except for the standards and interpretations described in paragraph (a) (i) included below, which were applicable to the Company and were effective during 2017. a. Application of new and revised International Financial Reporting Standards i) The Company adopted the following IFRS and interpretations of the consolidated financial statements that entered into effect as of the years that started on or after January 1, 2017: - Amendments to IAS 7 ( Disclosure Initiative ) - Amendments to IAS 12 ( Recognition of Deferred Tax Assets for Unrealized Losses Annual ) - Annual Improvements to IFRS 2014-2016 Cycle; IFRS 12 ( Disclosure of Interests in Other Entities ) Amendments to IAS 7 Disclosure Initiative The Company has applied these amendments for the first time in the current year. The amendments require an entity to provide disclosures that enable users of financial statements to evaluate changes in liabilities arising from financing activities, including both cash and non-cash changes. The Company’s liabilities arising from financing activities consist mainly of loans, and the changes of the opening and closing balances are described in note 15. The application of these amendments affected disclosures in the consolidated financial statements of the Company, as described in the previous paragraph. Amendments to IAS 12 Recognition of Deferred Tax Assets for Unrealized Losses The Company has applied these amendments for the first time in the current year. The amendments clarify how an entity should evaluate whether there will be sufficient future taxable profits against which it can utilize a deductible temporary difference. The application of these amendments has had no impact on the Company’s consolidated financial statements, as the Company already assesses the sufficiency of future taxable profits in a way that is consistent with these amendments. Annual Improvements to IFRSs 2014-2016 Cycle; IFRS 12 Disclosure of Interests in Other Entities The Company has applied the amendments to IFRS 12 included in the Annual Improvements to IFRSs 2014-2016 Cycle for the first time in the current year. The other amendments included in this package are not yet mandatorily effective and they have not been adopted by the Company. IFRS 12 states that an entity need not provide summarized financial information for interests in subsidiaries, associates or joint ventures that are classified (or included in a disposal group that is classified) as held for sale. The amendments clarify that this is the only concession from the disclosure requirements of IFRS 12 for such interests. The application of these amendments has had no effect on the Company’s consolidated financial statements as none of the Company’s interests in these entities are classified, or included in a disposal group that is classified, as held for sale. ii) The Company has not applied the following new and revised IFRS, which were issued but have not yet become effective: - IFRS 9 ( Financial Instruments ) (1) - IFRS 15 ( Revenue from Contracts with Customers ) (1) - IFRS 16 ( Leases ) (2) - Annual Improvements to IFRS Standards 2014-2016 Cycle; IFRS 1 ( First-time Adoption of International Financial Reporting Standards ) and IAS 28 ( Investments in Associates and Joint Ventures ) (1) - IFRIC 22 ( Foreign Currency Transactions and Advance Consideration ) (1) - IFRIC 23 ( Uncertainty over income Tax Treatments ) (2) (1) Effective for annual periods beginning on or after January 1, 2018, with earlier application permitted. (2) Effective for annual periods beginning on or after January1, 2019, with earlier application permitted. IFRS 9 Financial Instruments IFRS 9 issued in November 2009 introduced new requirements for the classification and measurement of financial assets. IFRS 9 was subsequently amended in October 2010 to include requirements for the classification and measurement of financial liabilities and for derecognition and in November 2013 to include the new requierments for general hedge accounting. Another revised version of IFRS 9 was issued in July 2014, mainly to include a) impairment requirements for financial assets and b) limited amendments to the classification and measurement requirements by introducing a “fair value through other comprehensive income” (FVTOCI) measurement category for certain simple debt instruments. Key requirements of IFRS 9: · All recognized financial assets that are within the scope of IFRS 9 Financial Instruments are required to be subsequently measured at amortized cost or fair value. Specifically, debt investments that are held within a business model whose objective is to collect the contractual cash flows, and that have contractual cash flows that are solely payments of principal and interest on the principal outstanding are generally measured at amortized cost at the end of subsequent accounting periods. Debt instruments that are held within a business model whose objective is achieved both by collecting contractual cash flows and selling financial assets, and that have contractual terms that give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding, are generally measured at FVTOCI. All other debt investments and equity investments are measured at their fair value through the net profit or loss. In addition, under IFRS 9, entities may make an irrevocable election to present subsequent changes in the fair value of an equity investment (that is not held for trading nor contingent consideration recognized by an acquirer in a business combination) in other comprehensive income, with only dividend income generally recognized in profit or loss. · With regard to the measurement of financial liabilities, IFRS 9 allows, optionally, to designate such liabilities as fair value through profit or loss, and requires that the amount of change in the fair value of the financial liability that is attributable to changes in the credit risk of that liability is presented in other comprehensive income, unless the recognition of the effects of changes in the liability’s credit risk in other comprehensive income would create or enlarge an accounting mismatch in profit or loss. Changes in fair value attributable to a financial liability’s credit risk are not subsequently reclassified to profit or loss. Under IAS 39 Financial Instruments: Recognition and Measurement , the entire amount of the change in the fair value of the financial liability designated as fair value through profit or loss is presented in profit or loss. · In relation to the impairment of financial assets, IFRS 9 requires an expected credit loss model, as opposed to an incurred credit loss model under IAS 39. The expected credit loss model requires an entity to account for expected credit losses and changes in those expected credit losses at each reporting date to reflect changes in credit risk since the beginning of the period. In other words, it is no longer necessary for a credit event to have occurred before credit losses are recognized. · The new general hedge accounting requirements retain the three types of hedge accounting mechanisms currently available under IAS 39. Under IFRS 9, greater flexibility has been introduced to the types of transactions eligible for hedge accounting, specifically broadening the types of instruments that qualify for hedging instruments and the types of risk components of non-financial items that are eligible for hedge accounting. In addition, the effectiveness test has been overhauled and replaced with the principle of an “economic relationship”. Retrospective assessment of hedge effectiveness is also no longer required. Enhanced disclosure requirements about an entity’s risk management activities have also been introduced. Based on an analysis of the Company’s financial assets and liabilities as of December 31, 2017, and taking into account the facts and circumstances that existed as of that date, the Company’s management evaluated the impact of the adoption of IFRS 9 in its consolidated financial statements, as described below: Classification and measurement · Obligations classified as held-to-maturity investments and loans at amortized cost, as detailed in Notes 6 and 21, are kept within a business model whose objective is to collect contractual cash flows that are only principal and interest payments on the outstanding principal. Accordingly, these financial assets will continue to be measured at amortized cost with the application of IFRS 9. · Regarding investments in securities classified as available-for-sale investments that are valued at fair market value, the Company does not include balances for this type of transactions in its consolidated financial statements. · Regarding unlisted shares, which are classified as available-for-sale investments that must be valued at fair market value, the Company does not include balances for this type of transaction in its consolidated financial statements. · The Company does not include redeemable cumulative preferential shares in its financial statements, which are to be valued at fair market value through net profit or loss (FVTPL). All other financial assets and financial liabilities will continue to be measured on the same basis currently established by IAS 39. Impairment of Financial Instruments The Company expects to apply a simplified model of expected loss to recognize credit losses for its trade account receivables, as required by IFRS 9. This model is carried out through a transition matrix, which considers the past behavior of the main customers and their historical account balances to estimate the probability of payment and the probability of default. The model also considers financial factors in the stock market, macroeconomic factors and in-house financial information to determine the severity of the loss. Using both variables, together with the information of each customer, one can determine the expected loss as an estimate of uncollectible accounts for a specific period. In general, the Company’s management expects that the application of the expected loss model of IFRS 9 to its accounts receivable from customers will not have a significant impact on its consolidated financial statements, due to the good performance of the Company’s portfolios and the quality and levels of guarantees that support accounts receivable from customers. Hedge accounting As of December 31, 2017, the Company does not use hedge accounting, so this provision in IFRS 9 does not impact the Company’s consolidated financial statements. IFRS 15 Revenue from Contracts with Customers IFRS 15, was issued in May 2014 and applies to annual reporting periods beginning on or after January 1, 2018. IFRS 15 establishes a single comprehensive model for entities to use to account for revenue arising from contracts with customers. IFRS 15 will supersede the current revenue recognition guidance including IAS 18 ( Revenue ), IAS 11 ( Construction Contracts ) and the related Interpretations when it becomes effective. The core principle of IFRS 15 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Specifically, the Standard introduces a 5-step approach to revenue recognition: · Step 1: Identify the contract(s) with a customer · Step 2: Identify the performance obligations in the contract · Step 3: Determine the transaction price · Step 4: Allocate the transaction price to the performance obligations in the contract · Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation Under IFRS 15, an entity recognizes revenue when (or as) a performance obligation is satisfied, i.e. , when ‘control’ of the goods or services underlying the particular performance obligation is transferred to the customer. Far more prescriptive guidelines have been added in IFRS 15 to deal with specific scenarios. Furthermore, extensive disclosures are required by IFRS 15. The Company has evaluated the impact on its consolidated financial statements from the adoption of this standard as of December 31, 2017, taking into account the following steps to recognize income: 1. Step 1 The contracts with customers meet the criteria established by IFRS 15 in order to be accounted for: they are clearly identified, they have a fixed duration and, in the case of regulated revenues, they can be modified by updating the rates in accordance with the tariff regulation system. 2. Step 2 Management has identified different performance obligations grouped into two types of services, aeronautical and non-aeronautical, and each performance obligation identified is presented in a disaggregated form. There are activities that are strongly correlated to the presentation of some services, which are not considered a different service, and therefore, are not treated as separate performance obligations. In connection with the concession contracts, Management recognized that IFRS 15 modifies IFRIC 12 (Service Concession Agreements) . Therefore, during construction activities, a cost is recognized in the income statement and as revenue as a result of such activities, thus recording an intangible asset, which was recognized as a separate performance obligation. 3. Step 3 The Company determines the price of the transaction using the amount of consideration presented in the contracts and the rates established in the annexes for each of the performance obligations identified. The impact is not recognized since that is consistent with current requirements. 4. Step 4 The Company allocates the transaction price to each of the performance obligations on the basis of independent sales prices; in this case, an applicable rate for each different service required in the contract. In some cases, discounts or incentives are applied directly to a performance obligation because this is established in the contract, so these variable considerations would not be applicable to all performance obligations. No impact was identified in relation to the allocation of the price to the different performance obligations, since they are recognized at their independent selling price. 5. Step 5 The revenue is recognized when the obligation is satisfied, such that, to the extent that the service is provided, the amount of the income recognized is the amount assigned to that performance obligation. Thus, the current system for recognition is consistent with the requirements under IAS 18 Revenue and IFRIC 12 Service Concession Agreements . Based on the facts and circumstances existing as of December 31, 2017, and in accordance with what is mentioned in the preceding paragraphs, the Company’s management anticipates that the adoption of the new IFRS 15 will not have a significant impact on the Company’s consolidated financial statements. IFRS 16 Leases IFRS 16 introduces a comprehensive model for the identification of lease arrangements and accounting treatments for both lessors and lessees. IFRS 16 was issued in January 2016 and will supersede the current lease guidance including IAS 17 Leases and the related interpretations when it becomes effective. IFRS 16 distinguishes leases and service contracts on the basis of whether an identified asset is controlled by a customer. “Distinctions of operating leases (off balance sheet) and finance leases (on balance sheet) are removed for lessee accounting and is replaced by a model where a right-of-use asset and a corresponding liability have to be recognized for all leases by lessees ( i.e. all on balance sheet) except for short-term leases and leases of low-value assets. The right-of-use asset is initially measured at cost and subsequently measured at cost (subject to certain exceptions) less accumulated depreciation and impairment losses, adjusted for any remeasurement of the lease liability. The lease liability is initially measured at the present value of the lease payments, as well as the impact of lease modifications, among others. Furthermore, the classification of cash flows will also be affected as operating lease payments under IAS 17 are presented as operating cash flows, whereas under the IFRS 16 model, the lease payments will be split into a principal and interest portion. However, a lessee may elect to account for lease payments as an expense on a straight-line basis over the lease term for leases with a lease term of 12 months or less and containing no purchase options (this election is made by class of underlying asset); and leases where the underlying asset has a low value when new, such as personal computers or small items of office furniture (this election can be made on a lease-by-lease basis). In contrast to lessee accounting, IFRS 16 substantially carries forward the lessor accounting requirements in IAS 17 and continues to require a lessor to classify a lease either as an operating lease or a finance lease. IFRS 16 establishes different transitional provisions, including retrospective application or the modified retrospective application where the comparative period is not restated. The Company is in the process of determining the potential impact that the adoption of this standard could have on its consolidated financial statements. Given the nature of its operations, it is not possible to provide a reasonable estimate of the effect of IFRS 16 until the Company’s management concludes the detailed review of the operating leases mentioned in note 18. Annual Improvements to IFRSs 2014 - 2016 Cycle ; IFRS 1 First-time Adoption of International Financial Reporting Standards and IAS 28 Investments in Associates and Joint Ventures The Annual Improvements include amendments to IFRS 1 and IAS 28, which are not yet mandatorily effective for the Company. The package also includes amendments to IFRS 12, which are mandatorily effective for the Company in the current year. There are two amendments to IAS 28, the first one clarifies that the option for a venture capital organization and other similar entities to measure investments in associates and joint ventures at FVTPL is available separately for each associate or joint venture, and that election should be made at initial recognition of the associate or joint venture. With respect to the option for an entity that is not an investment entity (IE) to retain the fair value measurement applied by its associates and joint ventures that are IEs when applying the equity method, the amendments make a similar clarification that this choice is available for each IE associate or IE joint venture. The amendments apply retrospectively with earlier application permitted. Amendments to IFRS 1 and IAS 28, which clarify the option for a venture capital organization and other similar entities to measure investments in associates and joint ventures at FVTPL, are effective for annual periods beginning on or after January 1, 2018. The Company’s management does not anticipate that the application of the amendments in the future will have any impact on the Company’s consolidated financial statements, as the Company is neither a first-time adopter of IFRS nor an investment entity. Furthermore, the Company does not have any associate or joint venture that is an investment entity. IFRIC 22 Foreign Currency Transactions and Advance Consideration IFRIC 22 addresses how to determine the “date of transaction” for the purpose of determining the exchange rate to use on initial recognition of an asset, expense or income, when consideration for that item has been paid or received in advance in a foreign currency that resulted in the recognition of a non-monetary asset or non-monetary liability ( e.g. , a non-refundable deposit or deferred revenue). The Interpretation specifies that the date of transaction is the date on which the entity initially recognizes the non-monetary asset or non-monetary liability arising from the payment or receipt of advance consideration. If there are multiple payments or receipts in advance, the Interpretation requires an entity to determine the date of transaction for each payment or receipt of advance consideration. The Interpretation is effective for annual periods beginning on or after January 1, 2018, with earlier application permitted. Entities can apply the Interpretation either retrospectively or prospectively. Specific transition provisions apply to prospective application. The application of these amendments will not have an impact on the Company’s consolidated financial statements, since the Company already accounts for transactions involving the payment or receipt of advance consideration in a foreign currency in a way that is consistent with the amendments. IFRIC 23 Uncertainty over Income Tax Treatments This interpretation seeks to clarify the recognition and measurement criteria established in IAS 12 Income Taxes when there are uncertain tax positions. Uncertain tax positions are those tax positions where there is uncertainty about whether the competent tax authority will accept the tax positions under the current tax laws. In such cases, the entity recognizes and measures its asset or liability for current or deferred taxes applying the requirements of IAS 12, based on tax profits (losses), tax bases, unused tax losses, unused tax credits and tax rates determined by applying this interpretation. The Company will apply IFRIC 23 for annual reporting periods beginning on or after January 1, 2019. Early application is permitted and the event must be disclosed. In its initial application, it is applied retrospectively under IAS 8 requirements, modifying comparative periods or retrospectively, with the accumulated effect of its initial application as an adjustment in the initial balance of retained earnings, without modifying comparative periods. The application of these amendments will not have any effect on the Company’s consolidated financial statements, this is because the Company does not have uncertainty over Income Tax Treatments that require an evaluation in accordance with this interpretation. b. Foreign currency transactions Foreign currency transactions are recorded at the exchange rate in effect at the date of the transaction date. Monetary assets and liabilities denominated in foreign currency are translated into Mexican pesos at the exchange rate prevailing at the end of the reporting period. Non-monetary items that are measured in terms of historical cost in a foreign currency are not retranslated. Exchange fluctuations are recorded in profit or loss, except for exchange differences on foreign currency borrowings relating to assets under construction for future productive use, which are included in the cost of those assets when they are regarded as an adjustment to interest costs on those foreign currency borrowings. c. Cash and cash equivalents Cash and cash equivalents consist mainly of bank deposits in checking accounts and short-term investments, highly liquid and easily convertible into cash, maturing within three months as of their acquisition date, which are subject to immaterial value change risks. Cash is stated at nominal value and cash equivalents are measured at fair value. d. Property, leasehold improvements and equipment, net Expenditures for property, leasehold improvements and equipment acquired are carried at acquisition cost. Depreciation is recognized so as to write off the cost or deemed cost of assets (other than freehold land and properties under construction). Depreciation of property, leasehold improvements and equipment is calculated using the straight-line method over the useful life of the asset, taking into consideration the related asset’s residual value. Depreciation begins in the month in which the asset is placed in service. The useful lives of assets are as follows: Useful Life (years) Improvement in leased assets 20 Machinery and equipment 10 Furniture and office equipment 10 Transportation equipment 4 Computer equipment 3.3 The depreciation of property, leasehold improvements and equipment is recorded in results. Disposal of assets The gain or loss on the sale or retirement of an item of property and equipment is calculated as the difference between the proceeds from the sale and the carrying value of the asset and is recognized in income when all risks and rewards of ownership of the asset is transferred to the buyer, which generally occurs when ownership of the asset is transferred to the buyer. Replacements or renewals of a component of property or equipment that extend the useful life of the asset, or its economic capacity, are recognized as an increase to property and equipment, with the subsequent write-off or derecognition of the assets replaced or renewed. Construction in progress for leasehold improvement Construction in progress for leasehold improvement is carried at cost less any recognized impairment loss. Cost includes professional fees and, in the case of qualifying assets, borrowing costs capitalized in accordance with the Company’s accounting policy. Such properties are transferred to the appropriate categories of property and equipment when completed and ready for intended use. The depreciation of these assets, as well as other properties, begins when the assets are ready for use. Subsequent costs Subsequent costs form part of the value of the asset or are recognized as a separate asset only when it is probable that such disbursement represents an increase in productivity, capacity, efficiency or an extension of the life of the asset, and the cost of the item can be determined reliably. All other expenses, including repairs and maintenance, are recognized in comprehensive income as incurred. e. Leasing Leases are classified as finance leases whenever the terms of the lease transfer substantially all the risks and rewards of ownership to the lessee. All other leases are classified as operating leases. Operating leasing As lessor Rental income from operating leases is recognized on a straight-line basis over the term of the relevant lease. Initial direct costs incurred in negotiating and arranging an operating lease are added to the carrying amount of the leased asset and recognized in profit using the same criteria used for the recognition of lease income. As lessee Any payment or collection made upon execution of an operating lease is treated as an advanced payment or collection that is recognized in results over the lease term, as the benefits of the leased asset are received or transferred. The costs and expenses arising under operating leases are recognized in results using the straight-line method during the term of the lease. Contingent rentals arising under operating leases are recognized as an expense in the period in which they are incurred. f. Guarantee deposits Guarantee deposits correspond to amounts received from lessees to guarantee performance under the lease. They are recorded at cost and are either returned to tenants at the end of the lease term or recognized against services unpaid by tenants. Additionally, certain agreements were entered into with airlines, which established escrow deposits paid by the airlines to guarantee their obligation for payment of the amounts collected from passengers for the Airport Use Fee (Tarifa de Uso de Aeropuertos or “TUA”) and other airport services. If the payment obligations are not met, the Company may immediately exercise the guarantees and utilize the funds. The aforementioned escrow deposits are recorded at cost. g. Borrowing costs Borrowing costs directly attributable to the acquisition, construction or production of qualifying assets, which are assets that necessarily take a substantial period of time to get ready for their intended use or sale, are added to the cost of those assets, until such time as the assets are substantially ready for their intended use or sale. Investment income earned on the temporary investment of specific borrowings pending their expenditure on qualifying assets is deducted from the borrowing costs eligible for capitalization. All other borrowing costs are recognized in profit or loss in the period in which they are incurred. h. Investment in airport concessions This item consists of the rights paid to manage, operate and, in certain cases make capital investments to 13 airports based on a concession granted by the Mexican Government through the Ministry of Communications and Transportation, and to use their facilities, for a 50-year term. Investment in concessions includes the rights to use airport facilities of airport concessions and improvements to concessioned assets and represents the amount granted by the Ministry of Communications and Transportation to each airport concessions, plus improvements made to each individual concession since the time of grant. Under all concession arrangements, (i) the grantor controls or regulates what services the Company must provide with the infrastructure, to whom it must provide them, and at what price; and (ii) the grantor controls, through ownership, any significant residual interest in the infrastructure at the end of the term of the arrangement. Accordingly, the Company classifies the assets derived from the construction, administration and operation of the service concession arrangements either as intangible assets, financial assets (accounts receivable) or a combination of both. The Company classifies its concessioned assets as an intangible asset, including its improvements. An intangible asset results when the operator constructs or makes improvements and is allowed to operate the infrastructure for a fixed period after construction is complete, in which the future cash flows of the operator have not been specified, because they may vary depending on the use of the asset, and are therefore considered contingent. The cost of financing incurred during the construction period is capitalized. Investments in airport concessions are amortized on a straight-line basis over the term of the concession, which is 50 years, or from the date of capitalization of additions or improvements considering the remaining term of the concession. Revenues and costs related to construction or improvements to intangible assets subject to the Company’s airport concession with the government are recognized as revenue based on the percentage of completion method associated with the related construction costs. i. Impairment of tangible and intangible assets Management periodically evaluates the impairment of long-lived assets in order to determine whether there is evidence that those assets have suffered an impairment loss. If impairment indicators exist, the recoverable amount of assets is determined, with the help of independent experts, to determine the extent of the impairment loss, if any. Intangible assets with indefinite useful life and intangible assets not yet available for use are tested for impairment at least annually, and whenever there is an indication that the asset may be impaired. Recoverable amount is the higher of fair value less costs to sell and value-in-use. In assessing value-in-use, the estimated future cash flows are discounted to their present value using a pre-tax discoun

Critical accounting judgments a

Critical accounting judgments and key sources of estimation uncertainty	12 Months Ended
	Dec. 31, 2017
Critical accounting judgments and key sources of estimation uncertainty
Critical accounting judgments and key sources of estimation uncertainty	5. Critical accounting judgments and key sources of estimation uncertainty In applying the Company’s accounting policies, described in note 4, the Company’s management makes judgments, estimates and assumptions about the carrying amounts of assets and liabilities in the consolidated financial statements. The estimates and underlying assumptions are based on historical experience and other factors considered relevant. Actual results may differ from these estimates. Estimates and assumptions are reviewed on an ongoing basis. Adjustments to accounting estimates are recognized in the period in which the adjustment is made and future periods if the change affects both the current period and to subsequent periods. a. Critical accounting judgments Critical judgments, other than those involving estimations (see paragraph b), made by management throughout the process of applying the Company’s accounting policies that have a material effect on the consolidated financial statements, are presented below. · Evaluation of the existence of control on investments in subsidiaries (see note 11). · Defined benefit obligations to the Company’s employees are discounted at a rate set by reference to market rates at the end of the reference period of Mexican government bonds. · The Company is subject to transactions or contingent events over which it applies professional judgment to determine the probability of occurrence. Factors considered in this determination are the legal situation as of the date on which the estimation is made and the opinion of legal advisors. b. Key sources of estimation uncertainty Basic assumptions concerning the future and other key sources of uncertainty in the estimates made at the end of the reporting period, that have a significant risk of causing significant adjustments to the carrying amounts of assets and liabilities within the following financial year are as follows: · To determine the estimation of doubtful accounts, the Company determines, among others, customer credit risk arising from its financial position and considerable delays in collections according to the terms agreed upon with customers (see note 7). · The Company’s long-lived assets correspond to concessions granted by the Mexican Government and properties, leasehold improvements and equipment. The Company reviews the carrying amounts of its long-lived assets to determine whether there are indications of impairment. In the Company’s analysis of impairment indicators, the Company identified indicators of a potential impairment in the Terminal 2 NH Hotel investment. After the analysis, the Company determined that the Terminal 2 NH Hotel was not impaired and therefore did not record any impairment loss during the period. The value in use calculation requires the Company to determine the future cash flows deemed to arise from the cash generating unit (“CGU”) and an appropriate discount rate to calculate the present value. The net book value of the investment in the Terminal 2 NH Hotel as of December 31, 2017 was Ps. 277,344; this does not reflect any impairment loss (see note 9). · The Company’s management reviews the estimated useful lives of property, leasehold improvements and equipment at the end of each annual period. Based on detailed analyses, the Company’s management could modify the useful life of certain assets of property, leasehold improvements and equipment. The degree of uncertainty associated with estimates of useful lives is related to market changes, use of assets and technological development. · Determining the recoverability of deferred tax assets and asset tax (Tax on Assets, or “IMPAC”) recoverable. · The Company’s management determines and recognizes, based on estimates, the major maintenance provision as per concession contracts with the Mexican Government to maintain and restore the airports’ infrastructure, which affects the results of periods ranging from the moment concession infrastructure becomes available for use through the date on which the maintenance and/or repair works are performed. The Company also calculates the appropriate discount rate for determining the present value of expected expenses that are required to meet its obligations. Although these estimates were made based on the best information available as of December 31, 2017, 2016 and 2015 it is possible that events may take place in the future that will require the Company to modify (increase or decrease) the amounts in the coming years, which in such case would be applicable on a prospective basis by recognizing the effects of changes in estimates in the corresponding consolidated financial statements.

Cash and cash equivalents

Cash and cash equivalents	12 Months Ended
	Dec. 31, 2017
Cash and cash equivalents.
Cash and cash equivalents	6. Cash and cash equivalents Cash and cash equivalents are composed as follows: December 31, 2017 2016 2015 Cash Ps. 602,074 Ps. 1,052,860 Ps. 86,388 Cash equivalents: Bank notes 1,269,090 932,638 1,574,653 Commercial paper 139,870 124,361 349,297 Money market investment funds 321,973 895,933 594,858 Ps. 2,333,007 Ps. 3,005,792 Ps. 2,605,196

Accounts receivable

Accounts receivable	12 Months Ended
	Dec. 31, 2017
Accounts receivable
Accounts receivable	7. Accounts receivable a. The balance of accounts receivable is as follows: December 31, 2017 2016 2015 Receivables Ps. 668,980 Ps. 781,612 Ps. 458,518 Allowance for doubtful accounts (note 7 b.) (38,223) (67,482) (67,733) Ps. 630,757 Ps. 714,130 Ps. 390,785 Accounts receivable represent principally the passenger charges ( TUA ) paid by each passenger (other than diplomats, infants, and transit passengers) using the airports operated by the Company. These are collected by airlines and subsequently paid to the Company. As of December 31, 2017, 2016 and 2015, amounts receivable for passenger charges amounted to Ps. 486,650, Ps. 567,818 and Ps. 309,711, respectively. The Company’s management considers that the carrying amount of accounts receivable approximates its fair value given their short-term nature. No interest income is generated by any short-term account receivable. As of December 31, 2017, 2016 and 2015, the balance of the allowance for doubtful accounts was Ps.38,223, Ps.67,482 and Ps.67,733 respectively, determined based on the default history and current financial situation of the Company’s customers. The following tables set forth a percentage of the principal customers that compose the accounts receivable (before allowance for doubtful accounts) as well as the revenues generated from the Company’s principal customers, which may represent a potential credit risk for the Company if the counterparty had financial and operating difficulties that would prevent them from being able to settle amounts due to the Company. December 31, 2017 2016 2015 % % % Accounts receivable: Aeroenlaces Nacionales, S. A. de C. V. 20.40 19.25 16.99 Concesionaria Vuela Compañía de Aviacion, S.A.P.I. de C.V. 18.14 18.42 4.80 ABC Aerolíneas, S. A. de C. V. 1.08 8.41 5.90 Aerolitoral, S. A. de C. V. 24.21 17.68 21.04 Compañía Mexicana de Aviación, S. A. de C. V., Aerovias Caribe, S. A. de C. V. y Mexicana Inter, S. A. de C. V. (1) - 0.60 2.97 Aerovías de México, S. A. de C.V. 6.01 6.27 8.20 (1) As of December 31, 2017, the balances of these customers were applied against the allowance for doubtful accounts. The balances owed from these clients were canceled against the allowance for doubtful accounts. As of December 31, 2016 and 2015, the balances owed from this client were fully reserved, in amounts of Ps. 13,611 in both years. Year ended December 31, 2017 2016 2015 % % % Revenues by client: Aerolitoral, S. A. de C. V. 14.17 14.33 15.59 Aeroenlaces Nacionales, S. A. de C. V. 15.19 13.72 12.54 ABC Aerolíneas, S. A. de C. V. 11.06 11.93 13.45 Concesionaria Vuela Compañía de Aviación, S. A. P. I. de C. V. 12.74 13.43 9.35 Aerovías de México, S. A. de C. V. 4.85 5.08 5.98 The management of accounts receivable and the determination of the need for an allowance for doubtful accounts are carried out by each individual entity that forms part of the consolidated financial statements, as each entity has more thorough knowledge of the financial situation and relationship with each of its customers. However, in each of the Company’s lines of business, certain guidelines exist regarding specific characteristics that each customer possesses depending on the nature of the line of business. b. The changes in the allowance for doubtful accounts are as follows: December 31, 2017 2016 2015 Beginning balance Ps. 67,482 Ps. 67,733 Ps. 184,579 (Decrease) increase (10,561) 749 (1,103) Write-off (18,698) (1,000) (115,743) Ending balance Ps. 38,223 Ps. 67,482 Ps. 67,733 Accounts receivable to customers include amounts that are past due at the end of the reporting period (see analysis below for aging), but for which the Company has not recognized any allowance for doubtful accounts since there has been no significant change in credit quality and the amounts are still considered recoverable. The cancellation of doubtful accounts is executed once the Company has exhausted all means for collection of the account. Generally, the cancellation is recognized when a judge determines the unlikelihood of payment. c. Aging of trade accounts receivable past due but not reserved December 31, 2017 2016 2015 Due: 1-120 days Ps. 41,294 Ps. 104,318 Ps. 39,969 121- 360 days 14,448 34,821 14,301 Total Ps. 55,742 Ps. 139,139 Ps. 54,270

Other accounts receivable and p

Other accounts receivable and prepaid expenses	12 Months Ended
	Dec. 31, 2017
Other accounts receivable and prepaid expenses.
Other accounts receivable and prepaid expenses	8. Other accounts receivable and prepaid expenses Other accounts receivable and prepaid expenses are comprised as follows: December 31, 2017 2016 2015 Prepaid expenses Ps. 23,310 Ps. 14,316 Ps. 18,529 Guarantee deposits 5,800 5,844 6,512 Others 9,746 8,745 4,983 Ps. 38,856 Ps. 28,905 Ps. 30,024

Property, leasehold improvement

Property, leasehold improvements and equipment	12 Months Ended
	Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [abstract]
Property, leasehold improvements and equipment	9. Property, leasehold improvements and equipment Property, leasehold improvements and equipment are as follows: December 31, 2017 2016 2015 Net carrying value: Land (note 10) Ps. 1,709,508 Ps. 1,707,236 Ps. 1,715,636 Leasehold improvements 660,589 456,505 424,511 Machinery and equipment 116,117 130,349 146,626 Furniture and office equipment 47,113 50,835 61,200 Transportation equipment 36,246 9,042 8,548 Computer equipment 9,483 12,020 14,454 Construction in progress for leasehold improvements 22,341 78,218 — Ps. 2,601,397 Ps. 2,444,205 Ps. 2,370,975 Construction Machinery Furniture in progress of Leasehold and and office Transportation Computer leasehold Cost Land improvements equipment equipment equipment equipment improvements Total Balance as of January 1, 2015 Ps. 1,715,636 Ps. 338,393 Ps. 179,697 Ps. 133,757 Ps. 28,043 Ps. 50,481 Ps. 78,671 Ps. 2,524,678 Acquisitions — — 14,941 11,407 2,102 10,878 109,329 148,657 Disposals — — — — (1,024) — — (1,024) Transfers — 188,000 — — — — (188,000) — Other — — — (181) — (1,172) — (1,353) Balance as of December 31, 2015 1,715,636 526,393 194,638 144,983 29,121 60,187 — 2,670,958 Acquisitions — 12,963 2,223 2,787 6,227 4,040 124,878 153,118 Disposals (8,400) — — (625) (3,030) (31) — (12,086) Transfers — 46,660 — — — — (46,660) — Other — — — — — — — — Balance as of December 31, 2016 1,707,236 586,016 196,861 147,145 32,318 64,196 78,218 2,811,990 Acquisitions 235,091 Disposals — — (249) — (4,532) (62) — (4,843) Transfers — 131,730 — — — — (131,730) — Other — — — (183) (1,274) (242) — (1,699) Balance as of December 31, 2017 Ps. 1,709,508 Ps. 825,481 Ps. 201,114 Ps. 153,355 Ps. 61,043 Ps. 67,697 Ps. 22,341 Ps. 3,040,539 Construction in Furniture and progress of Accumulated Leasehold Machinery and office Transportation Computer leasehold depreciation improvements equipment equipment equipment equipment improvements Total Balance as of January 1, 2015 Ps. (83,154) Ps. (29,980) Ps. (71,194) Ps. (15,554) Ps. (40,482) Ps. — Ps. (240,364) Disposals — — — 890 — — 890 Depreciation (18,728) (18,032) (12,768) (5,909) (6,428) — (61,865) Other — — 179 — 1,177 — 1,356 Balance as of December 31, 2015 (101,882) (48,012) (83,783) (20,573) (45,733) — (299,983) Disposals — — — 3,007 31 3,038 Depreciation (27,629) (18,500) (12,527) (5,710) (6,474) — (70,840) Other — — — — — — — Balance as of December 31, 2016 (129,511) (66,512) (96,310) (23,276) (52,176) — (367,785) Disposals — — — 4,532 47 — 4,579 Depreciation (35,342) (18,674) (10,112) (7,264) (6,323) — (77,715) Other (39) 189 180 1,211 238 — 1,779 Balance as of December 31, 2017 Ps. (164,892) Ps. (84,997) Ps. (106,242) Ps. (24,797) Ps. (58,214) Ps. — Ps. (439,142) Operation of the Terminal 2 NH Hotel : The recoverable amount of the CGU is determined by calculating its value in use, which requires cash flow projections based on financial budgets approved by the Company’s management for the remainder of the lease period. During the projection period, the Company’s management projects an occupancy level of 88% in 2018 and, according to current trends in occupancy levels, 82% for the subsequent four-year period (2019-2022). For the years 2023 and 2024, the potential stoppage of operations of the Mexico City airport leads to a decrease of projected occupancy levels to 53% and 63%, respectively. For the remaining periods, starting in 2025, the Company’s management extrapolated cash flows using an occupancy rate comparable to that of its competitors in the market with similar levels of infrastructure and expertise, which was 71%. Management considers that a reduction in the occupancy rate from 82% to 71%, the growth levels in revenues based on expected inflation in Mexico and the use of a discount rate before taxes of 24.53% would not significantly affect the value in use, such that it would continue to exceed the carrying amount of the CGU as of December 31, 2017. Management does not believe that a reasonable change in the key assumptions of its projections, such as the occupancy rate, average rate, and/or discount rate, would cause the carrying value of the investment in Terminal 2 NH Hotel to exceed its recoverable amount.

Investment in airport concessio

Investment in airport concessions	12 Months Ended
	Dec. 31, 2017
Investment in airport concessions
Investment in airport concessions	10. Investment in airport concessions The Company has concessions to operate, maintain and develop 13 airports in Mexico, which are concentrated in central and northern regions of the country. Each concession is for 50 years from November 1, 1998. The term of each of the Company’s concessions may be extended by the Ministry of Communications and Transportation under certain circumstances for a period not exceeding 50 years. As operators of 13 airports the Company earns revenue from airlines, passengers, and other users for using the airport facilities. The Company also earns revenues for commercial activities carried out at the airports, such as leasing of space to restaurants and other shops. Each airport concession agreement contains the following terms and basic conditions: a. The concessionaire has the right to manage, operate, maintain and use the airport facilities and carry out any construction, improvements or maintenance of the related facilities in accordance with its five-year period master development program, and to provide airport, complementary and commercial services. b. The concessionaire will use the airport facilities only for the purposes specified in the concession agreement, will provide services in conformity with the law and applicable regulations and will be subject to inspections by the Ministry of Communications and Transportation. c. The concessionaire must pay a concession tax for the right to use airport facilities (currently 5% of the concessionaire’s annual gross revenues derived from the use of public property), in conformity with the Mexican Federal Duties Law. d. The Mexican Airport and Auxiliary Services agency (Aeropuertos y Servicios Auxiliares) has the exclusive right to supply fuel at the concessionaire’s airports. e. The concessionaire must grant free access to specific airport areas to certain Mexican government agencies, so that they may carry out their activities within the airports. f. The concession may be revoked if the concessionaire breaches any of its obligations established in the concession title, as established in Article 26 and 27 of the General Airports Law and in the concession title. The breach of certain concession terms may be cause for revocation if the Ministry of Communications and Transportation has applied sanctions in three different instances with respect to the same concession term. The terms and conditions of each concession contract have been fulfilled in all important aspects during the years ended December 31, 2017, 2016 and 2015. Investments in airport concessions include: improvements to concessioned assets, rights to use airport facilities, and airport concessions. The total cost of the concession was assigned proportionally to rights to use airport facilities on the basis of the fair value of the assets determined by an independent appraiser. At any airport concession where the cost exceeded the fair value, the excess was recognized within the airport concessions line item. As of December 31, 2017, 2016 and 2015, the carrying value of the right to use airport facilities, airport concessions and improvement to concessioned assets classified as intangible assets are as follows: December 31, 2017 2016 2015 Projects completed and in operation: Airport concessions Ps. 605,643 Ps. 605,643 Ps. 605,643 Rights to use airport facilities 3,356,762 3,356,762 3,356,762 Improvements to concessioned assets (note 15) 5,859,174 4,532,716 4,187,944 Accumulated amortization (2,173,162) (1,981,607) (1,801,744) Ps. 7,648,417 Ps. 6,513,514 Ps. 6,348,605 The changes in investment in concessions are as follows: December 31, 2017 2016 2015 Investment in airport concessions Beginning balance Ps. 8,495,121 Ps. 8,150,349 Ps. 7,807,228 Increase 1,326,458 344,772 347,988 Disposals - — (4,867) Ending balance 9,821,579 8,495,121 8,150,349 Amortization of airport concessions: Beginning balance (1,981,607) (1,801,744) (1,626,951) Increase (191,555) (179,863) (175,106) Disposals — — 313 Ending balance (2,173,162) (1,981,607) (1,801,744) Net investment in airport concessions Ps. 7,648,417 Ps. 6,513,514 Ps. 6,348,605 Master Development Plan — The Company is obligated to carry out maintenance and improvements to concessioned assets according to the master development program. The master development program for 2016-2020 is Ps.4,445,653 based on December 31, 2014 values and Ps.5,443,013 based on December 31, 2017 values, updated using the National Producer Price Index (NPPI) excluding oil, in accordance with the concession contract, the amount to be incurred at December 31, 2017 was Ps.3,554,823, which has a payment schedule in accordance with the following: Year Amount 2018 Ps. 2,377,074 2019 711,353 2020 466,396 Ps. 3,554,823 In 2009, the Company paid Ps.1,159,613 to acquire land strategically located adjacent to the Monterrey airport to allow for the airport’s future growth, including the construction of a second runway, which the Company intends to complete in the future. The Company is negotiating the recognition of the cost of the investment made in this land with the Mexican Bureau of Civil Aviation, to enable the latter to recognize the land acquired within the framework of the future investments in the concession of the Monterrey airport as part of the master development program required for such airport, not as a fixed asset owned by the Company. On December 4, 2012, the Monterrey airport received authorization from the Mexican Bureau of Civil Aviation to include Ps.386,538 (amount expressed in nominal pesos of 2009) in investments as part of master development program for 2011-2015. An additional amount of Ps.77,306 was authorized by the Mexican Bureau of Civil Aviation through an extraordinary review of the maximum rate in the year 2011. The Company is still negotiating with the Mexican Bureau of Civil Aviation the recognition as an investment in concession of the remainder of the cost of the land acquired for the amount of Ps.695,759. All the amounts included in this disclosure are expressed in pesos of December 31, 2009. The current amounts, when recognized by the Mexican Bureau of Civil Aviation as part of the investment in concession, will be adjusted based on the NCPI. The Company’s airports exclusively own the lands acquired, which are classified in the consolidated statements of financial position under the headings of property, leasehold improvements and equipment. The land will remain classified under these headings until the negotiations with the Mexican Bureau of Civil Aviation have concluded. If the Mexican Bureau of Civil Aviation recognizes the land as part of the concession investment, it is estimated that the property will be transferred to the Mexican Government. At the time of such recognition, the Company shall derecognize the asset and recognize an inclusion of the same amount under investment in airport concessions (improvements in concessioned assets), which will be subject to amortization for the remaining period of the concession. The Company’s improvements to the airport facilities can be recognized by the Mexican Bureau of Civil Aviation ( DGAC ) as part of the investment in airport concession. The cost of airport improvements recognized by DGAC that are part of the Company’s investment in concessioned assets is “recovered” in the form of adjustments to the maximum rates that the Company may charge for aeronautical services, which are regulated by DGAC.

Composition of GACN

Composition of GACN	12 Months Ended
	Dec. 31, 2017
Composition of GACN
Composition of GACN	11. Composition of GACN a. The following tables set forth information about the composition of GACN as of December 31, 2017, 2016 and 2015: Place of incorporation and Number of Principal activity operation subsidiaries Airports Mexico 13 Hotels Mexico 2 Services Mexico 9 24 b. The consolidated subsidiaries are as follows: Name of subsidiary Ownership Percentage Airport services Aeropuerto de Monterrey, S. A. de C. V. 100 % Aeropuerto de Acapulco, S. A. de C. V. 100 % Aeropuerto de Mazatlan, S. A. de C. V. 100 % Aeropuerto de Zihuatanejo, S. A. de C. V. 100 % Aeropuerto de Culiacan, S. A. de C. V. 100 % Aeropuerto de Ciudad Juarez, S. A. de C. V. 100 % Aeropuerto de Chihuahua, S. A. de C. V. 100 % Aeropuerto de Torreon, S. A. de C. V. 100 % Aeropuerto de Durango, S. A. de C. V. 100 % Aeropuerto de Tampico, S. A. de C. V. 100 % Aeropuerto de Reynosa, S. A. de C. V. 100 % Aeropuerto de Zacatecas, S. A. de C. V. 100 % Aeropuerto de San Luis Potosi, S. A. de C. V. 100 % Hotels and Services Operadora de Aeropuertos del Centro Norte, S. A. de C. V. 100 % Servicios Aeroportuarios del Centro Norte, S. A. de C. V. 100 % Servicios Aero Especializados del Centro Norte, S. A. de C. V. 100 % OMA Logistica, S. A. de C. V. (1) 100 % Holding Consorcio Grupo Hotelero T2, S. A. de C. V. (2) 100 % (1) Includes subsidiaries in which the Company holds an equity participation through OMA Logistica: OMA VYNMSA Aero Industrial Park, S.A. de C.V (VYNMSA) (51%), Consorcio Hotelero Aeropuerto de Monterrey, S.A.P.I de C.V (85%) and Servicios Hoteleros Aeropuerto de Monterrey, S.A. de C.V. (85%). (2) Provides hotel services and includes subsidiaries in which the Company holds an equity participation through Holding Consorcio Hotelero T2: Servicios Complementarios del Centro Norte, S.A. de C.V. (100%), Servicios Corporativos Terminal 2, S.A. de C.V. (100%), and Consorcio Grupo Hotelero T2, S.A. de C.V. (90%). The Company has the majority of voting power at shareholders’ meetings of the subsidiaries and has control by virtue of its contractual right to appoint the board of directors of the companies. As of December 31, 2017, 2016 and 2015, the Company has not made investments in shares of any structured or investment-related entity.

Trade accounts payable

Trade accounts payable	12 Months Ended
	Dec. 31, 2017
Trade accounts payable
Trade accounts payable	12. Trade accounts payable Trade accounts payable consist of the following: December 31, 2017 2016 2015 Suppliers and contractors Ps. 207,190 Ps. 212,939 Ps. 165,165 Customer advances 42,317 39,892 78,702 Statutory employee profit sharing 6,475 9,242 9,491 Ps. 255,982 Ps. 262,073 Ps. 253,358

Payable taxes and other accrued

Payable taxes and other accrued expenses	12 Months Ended
	Dec. 31, 2017
Payable taxes and other accrued expenses
Payable taxes and other accrued expenses	13. Payable taxes and other accrued expenses Tax payable and other accrued expenses are comprised of the following: December 31, 2017 2016 2015 Accrued expenses Ps. 145,123 Ps. 183,175 Ps. 171,046 Taxes payable other than income tax 220,524 262,772 158,589 Accrued interest 69,125 43,254 42,425 Ps. 434,772 Ps. 489,201 Ps. 372,060

Short-term debt

Short-term debt	12 Months Ended
	Dec. 31, 2017
Short-term debt
Short-term debt	14. Short-term debt As of December 31, 2017, the Company has short-term credit lines available with financial institutions for Ps.350,000.

Major maintenance provision

Major maintenance provision	12 Months Ended
	Dec. 31, 2017
Major maintenance provision.
Major maintenance provision	16. Major maintenance provision The Company has the obligation to perform major maintenance activities in its airports. The provision is recognized as accrued at an amount that represents the best estimate of the present value of future disbursements required to settle the obligation, at the date of the accompanying consolidated financial statements at a discount rate of 8.85%, 9.42% and 6.85% as of December 31, 2017, 2016 and 2015, respectively. As of December 31, 2017, 2016 and 2015, the composition and changes of the Company’s major maintenance provision was as follows: December 31, December 31, 2017 2016 Additions Disbursements Short-term Long-term Major maintenance of concessioned assets Ps. 669,653 Ps. 285,755 (1) Ps. (97,784) Ps. 232,645 Ps. 624,979 December 31, December 31, 2016 2015 Additions Disbursements Short-term Long-term Major maintenance of concessioned assets Ps. 603,703 Ps. 168,804 (1) Ps. (102,854) Ps. 160,607 Ps. 509,046 December 31, December 31, 2015 2014 Additions Disbursements Short-term Long-term Major maintenance of concessioned assets Ps. 592,789 Ps. 182,561 (1) Ps. (171,647) Ps. 220,410 Ps. 383,293 (1) Includes Ps. (5,477), Ps. (94,072) and Ps. 8,268, recognized as interest (income) expense in the consolidated statement of income and other comprehensive income, for the accumulated effect of the present value estimation as of December 31, 2017, 2016 and 2015, respectively.

Labor obligations

Labor obligations	12 Months Ended
	Dec. 31, 2017
Labor obligations
Labor obligations	17. Labor obligations a. Defined c o ntribution plan The Company offers defined contribution plans for all employees who qualify. The plan assets are kept separate from the Company’s assets in funds kept in a trust under the control of trustees. If the employee leaves the plan before fully vesting, the trust will pay the employee up to 50% as of the fifth year in which he or she adhered to such plan and increase by 10% each year until reaching 100%. The total contributions to these plans based on the specific rates in the plan amounted to Ps.1,105, Ps.1,666 and Ps.1,460 in 2017, 2016 and 2015, respectively. A total of Ps.541, Ps.2,628 and Ps.2,232 in 2017, 2016 and 2015, respectively, is pending of payment to the trust. b. Defined benefit plans This liability for employees derives from a pension plan, seniority premiums benefits and termination benefits. Seniority premiums consist of a single payment equal to 12 days’ salary for each year of service based on the employee’s most recent salary based on the Unidad de Medida y Actualización (Unit of Measurement and Update), but without exceeding twice the current minimum wage established by law and the payments for the pension plan consist of an equivalent of 20 days for each year worked and 90 days based on the pensionable salary determined on actuarial calculations performed by external actuaries, using the projected unit credit. As of December 2011, the pension plan was modified, establishing an early retirement from age 60 for all employees with at least 10 years of service to the Company. The Mexican plans normally expose the Company to actuarial risks such as: investment risk, interest rate risk, longevity risk and salary risk. Investment risk The present value of the defined benefit plan obligations is calculated using a discount rate that is determined by long-term government bond yields. To select the discount rate, the yield rate of the bond is considered, which is similar to the duration of the obligations of the Company’s labor liabilities. The average days on which benefit payments are due and not the days that the bonus is due to expire are taken in to account, which means that the discount rate depends on the expectation of the flow of payments of the benefits plan. Interest risk A decrease in the interest rate of the bonds may increase the liabilities of the plan, however, this is partially offset by an increase in the plan’s debt investment performance. Longevity risk The present value of the defined benefit plan liability is calculated by reference to the best estimate of the mortality of plan participants both during and after their employment. An increase in the life expectancy of the plan participants will increase the plan’s liability. Salary risk The present value of the defined benefit plan liability is calculated by reference to the future salaries of plan participants. As such, an increase in the salary of the plan participants will increase the plan’s liability. There are no additional retirement benefit plans for qualifying employees. The actuarial calculation of the defined benefit obligation was calculated as of December 31, 2017, 2016 and 2015 by actuaries certified by the National School of Actuaries ( Colegio Nacional de Actuarios de México ). The present value of the defined benefit obligation, and the related current service cost and past service cost, were measured using the projected unit credit method. The principal assumptions used for the purposes of the actuarial valuations are as follows: Year ended December 31, 2017 2016 2015 Discount rate (note 5 a.) 7.75 % 7.75 % 7.25 % Expected rate of salary increase 4.50 % 4.50 % 4.50 % Average longevity at retirement age for current pensioners (years) 14 15 12 Inflation 3.50 % 3.50 % 3.50 % The amounts recognized in the statement of income and other comprehensive income in respect of these defined benefit plans are as follows: Year ended December 31, 2017 2016 2015 Service cost: Current service cost Ps. 7,995 Ps. 7,629 Ps. 7,574 Net interest expense 7,672 6,664 5,627 Components of defined benefit costs recognized in profit or loss 15,667 14,293 13,201 Remeasurement on the net defined benefit liability: Actuarial gains and losses arising from changes in financial assumptions — (5,815) (4,554) Actuarial gains and losses arising from experience adjustments 4,199 2,282 5,840 Components of defined benefit costs recognized in other comprehensive income 4,199 (3,533) 1,286 Total Ps. 19,866 Ps. 10,760 Ps. 14,487 The current service cost and the net interest expense are included in the employee benefits expense in the consolidated statement of income and in other comprehensive income. The remeasurement of the net defined benefit liability is included in other comprehensive income. The amount included in the consolidated statement of financial position arising from the Company’s obligation in respect of its defined benefit plans is as follows: December 31, 2017 2016 2015 Present value of defined benefit obligations Ps. 127,479 Ps. 111,921 Ps. 106,414 Movements in the present value of the defined benefit obligation in the current year are as follows: December 31, 2017 2016 2015 Present value of defined benefit obligation as of January 1, Ps. 111,921 Ps. 106,414 Ps. 94,313 Current service cost 7,995 7,629 7,574 Interest cost 7,672 6,664 5,627 Remeasurement (gains)/losses: Actuarial gains and losses arising from changes in financial and demographic assumptions - (5,815) (4,554) Actuarial gains and losses arising from experience adjustments 4,199 2,282 5,840 Benefits paid (4,308) (5,253) (2,386) Present value of defined benefit obligation Ps. 127,479 Ps. 111,921 Ps. 106,414 Significant actuarial assumptions for the determination of the defined obligation are discount rate, expected salary increase and mortality. The sensitivity analyses below have been determined based on reasonably possible changes of the respective assumptions occurring at the end of the reporting period, while holding all other assumptions constant.  If the discount rate increases (decreases) by 1%, the defined benefit obligation would decrease to Ps.118,737 (increase by Ps.137,803).  If the expected salary growth increases (decreases) by 1%, the defined benefit obligation would increase to Ps.136,949 (decrease by Ps.119,365). The sensitivity analysis presented above may not be representative of the actual change in the defined benefit obligation as it is unlikely that the change in assumptions would occur in isolation of one another as some of the assumptions may be correlated. Furthermore, in presenting the above sensitivity analysis, the present value of the defined benefit obligation has been calculated using the projected unit credit method at the end of the reporting period, which is the same as that applied in calculating the defined benefit obligation liability recognized in the consolidated statement of financial position. There was no change in the methods and assumptions used in preparing the sensitivity analysis from prior years. There was no change in the process followed by the Company to manage its risks from prior periods. The average duration period of the benefit obligation as of December 31, 2017 is 9.0 years (2016: 8.8 years and 2015: 9.0 years). Expected cash flows from pension plans and seniority premium benefits are as follows: Seniority premium Year Pensions plan benefits Total 2018 Ps. 28,776 Ps. 1,638 Ps. 30,414 2019 6,435 1,469 7,904 2020 8,397 1,505 9,902 2021 5,370 1,489 6,859 2022 5,361 1,520 6,881 From 2023 to 2028 44,122 8,563 52,685 Total Ps. 98,461 Ps. 16,184 Ps. 114,645

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2017
Income taxes
Income taxes	19. Income taxes The Company is subject to Income Tax (“ISR”), whose tax rate was 30% for 2017, 2016 and 2015 and will continue at 30% for later years. In 2008, the Asset Tax Law was repealed, however, under certain circumstances, the IMPAC paid during the ten years prior to the year in which ISR is paid may be recovered, according to the terms of the law. a. Income tax are as follows: Year ended December 31, 2017 2016 2015 Current ISR Ps. 810,641 Ps. 672,298 Ps. 453,066 Deferred ISR 2,432 74,484 59,044 Income tax expense Ps. 813,073 Ps. 746,782 Ps. 512,110 b. As of December 31, 2017, 2016 and 2015, the principal items comprising the balance of the deferred ISR asset (liability) were: December 31, 2017 2016 2015 Liabilities: Provisions, allowances and labor obligations Ps. 116,740 Ps. 99,313 Ps. 69,288 Investment in airport concessions, property, leasehold improvements and equipment, net (362,866) (419,384) (386,888) Tax loss carryforwards (1) 9,955 53,004 42,919 Recoverable tax on assets 39,090 48,276 73,633 Total liabilities Ps. (197,081) Ps. (218,791) Ps. (201,048) Assets: Provisions, allowances and labor obligations Ps. 217,987 Ps. 190,164 Ps. 189,002 Investments in airport concessions, property, leasehold improvements and equipment, net (281,119) (303,839) (360,211) Tax loss carryforwards (1) 411,166 493,778 634,469 Total assets Ps. 348,034 Ps. 380,103 Ps. 463,260 Net deferred ISR asset Ps. 150,953 Ps. 161,312 Ps. 262,212 (1) As of December 31, 2017, 2016 and 2015, the Company recognized a deferred tax asset of Ps.421,121, Ps.546,782 and Ps.677,388, respectively, corresponding to the tax losses generated by its subsidiaries. All subsidiaries of the Company expect to benefit from losses in future years based on projections of taxable income and various strategies with favorable tax consequences. For the years ended December 31, 2017 and 2016, the Company did not make changes in the deferred asset estimates for amortizable tax losses. c. The changes in deferred tax during the year are as follows: December 31, 2017 2016 2015 Beginning balance of deferred tax liability, net Ps. 161,312 Ps. 262,212 Ps. 314,430 Deferred ISR in results (2,432) (74,484) (59,044) Recoverable tax on assets (9,186) (25,356) 6,440 Income tax effects recognized in other comprehensive income 1,259 (1,060) 386 Ending balance of deferred tax asset, net Ps. 150,953 Ps. 161,312 Ps. 262,212 d. The reconciliation of the statutory income tax rate and the effective income tax rate as a percentage of net income before income tax is as follows: Year ended December 31, 2017 2016 2015 Amount Rate % Amount Rate % Amount Rate % Income before income taxes Ps. 2,950,515 Ps. 2,623,283 Ps. 1,748,747 Current ISR 810,641 672,298 453,066 Deferred ISR 2,432 74,484 59,044 Effective rate Ps. 813,073 27.56 % Ps. 746,782 28.47 % Ps. 512,110 29.28 % Add (deduct) effects of permanent differences, primarily, non-deductible expenses and inflationary effects for financial and tax purposes. 71,107 2.41 % 37,513 1.43 % 19,236 1.10 % Other 975 0.03 % 2,690 0.10 % (6,722) (0.38) % Statutory rate Ps. 885,155 30.00 % Ps. 786,985 30.00 % Ps. 524,624 30.00 % e. Each airport concession has received approval from the Ministry of Finance and Public Credit ( Secretaría de Hacienda y Crédito Público ) to carry forward their tax losses up to the earlier of the date of which such tax loss carryforwards are utilized by the airport or the date of expiration or liquidation of the concession. The base years and amounts as of December 31, 2017 are as follows: Tax loss Year of Origin carryforwards 2001 Ps. 5,745 2002 190,164 2003 346,924 2004 423,841 2005 60,981 2006 64,235 2007 86,884 2008 42,405 2009 5,072 2011 31,988 2012 65,230 2013 40,508 2015 30,112 Ps. 1,394,089 f. In addition to the tax loss carryforwards of the airport concessionaires aforementioned, the Company has tax losses of other subsidiaries other than its concessionaires in the amount of Ps.9,648 the duration of which is 10 years under the Income Tax Law, and the maturity date of which is between 2018 and 2026. g. In 2017, the Company utilized tax loss carryforwards in the amount of Ps.506,543. h. During 2002 through 2007, the Company recognized a deferred tax asset for IMPAC paid in the amount of Ps.67,193 in 2013, which may be recoverable subject to certain conditions established in the Income Tax Law, recognizing an update of Ps.6,440 in 2015. The Company recovered an amount of Ps.9,186 in 2017, and Ps. 25,356 in 2016. The updated amount as of December 31, 2017 was Ps.39,090. i. December 31, 2017 2016 2015 Contributed capital account Ps. 3,940,312 Ps. 3,700,652 Ps. 3,580,472 Net consolidated tax profit account 1,331,694 1,018,588 1,515,123 Total Ps. 5,272,006 Ps. 4,719,240 Ps. 5,095,595 k. Dividends paid from profits generated from January 1, 2014 to individuals residing in Mexico and residents abroad may be subject to additional income taxes of up to 10%, which shall be retained by the Company.

Commitment and contingencies

Commitment and contingencies	12 Months Ended
	Dec. 31, 2017
Disclosure of contingent liabilities [abstract]
Disclosure of commitments and contingent liabilities [text block]	20. Commitment and contingencies Commitment Guarantor — In 2014 and 2013, GACN issued long-term debt securities for the amount of Ps. 3,000,000 and Ps. 1,500,000 with terms of 7 and 10 years, respectively, under the 2011 program. The Company and nine of its airports are guarantors of the debt securities and must provide a minimum guarantee equal to 80% of EBITDA. Contingencies a. Property tax. Reynosa Airport Administrative law proceedings have been asserted against the Company in the past by the municipality for the payment of property tax with respect to the real estate on which the Company operates the airport in this city. In November 2011, August 2012 and March 2014, the municipality of Reynosa filed property tax claims against the Company for Ps.127,312,Ps.1,119 and Ps.1,361, respectively. In response to these claims, the Company has filed administrative appeals before the Administrative Court ( Tribunal de lo Contencioso Administrativo del Estado de Tamaulipas ). As of the date of the consolidated financial statements, the contingencies are maintained due to the fact that the judgment continues in force since there is still no decision to resolve these matters in which the Ministry of Communications and Transportation is already involved. However, in the event that the judgment is not favorable to the Reynosa airport, the economic impact of the trial will be borne by the Mexican government. The Reynosa airport has not recorded any provision in connection to these claims since it does not expect an economic impact, even in case of an unfavorable resolution. b. Amparo trial related to the requirement of municipal licenses: 1. Ciudad Juarez Airport · In April 2016, the General Department of Urban Development of the Municipality of Ciudad Juarez notified the entry into force of the Public and Private Parking Lots Operations Regulation, which imposed a series of obligations on the airport as the operator of public parking lots, with the aim of preventing the concessionaire from continuing to provide parking lot services through charge-by-entry. Subsequently, on April 19, 2016, municipal authorities executed the closure of the public parking lots in the airport claiming the lack of a license to operate and non-compliance with the corresponding regulations. An amparo constitutional claim was filed against such acts challenging the closure and claiming the unconstitutionality of the municipal regulation. The trial was admitted and in December 2016 the Court issued a resolution in favor of the airport indicating a lack of municipal authority due to the application of the regulations in an area where only the federal government has jurisdiction. Currently, there is an appeal pending against the decision that granted amparo protection to the airport. · In April 2016, the municipal authority of Ciudad Juarez carried out verification visits at the business premises located at the airport to request the municipal operating licenses, and subsequently ordered the closure of ten businesses in the airport for not having such license. · Against such acts, an amparo trial was filed by the Ciudad Juarez airport to challenge the closure and claim the unconstitutionality of the municipal order. The claim was admitted and the court decided in favor of the airport on November 24, 2017, indicating a lack of municipal authority due to the application of municipal regulations in an area where only the federal government has jurisdiction. This decision concluded the trial in favor of the airport. c. Conflict related with ownership of certain lands 1. Reynosa airport · The Company filed a proceeding for annulment against the Mexican Bureau of Civil Aviation and the Ministry of Communications and Transportation with the Administrative Court ( Tribunal de lo Contencioso Administrativo del Estado de Tamaulipas ) in relation to the administrative ruling containing a constructive disapproval of the application filed by the plaintiff with the Ministry of Communications and Transportation for the return of land of 200,000 hectares (772 square miles) — Trial Number 13226/13-17-07-04. The plaintiff claims that this land is situated within Reynosa airport. The Reynosa airport has been summoned in its capacity as an interested third party. The elements of the claim are: (i) the annulment of the administrative act that deprived the plaintiff of its ownership of the real property; (ii) the restitution of the ownership rights of which it was deprived due to an irregular administrative act; (iii) the immediate return of its ownership of the real property; and (iv) the payment of damages. These claims are based on the argument submitted by the plaintiff to the effect that the disputed land is not subject to an expropriation decree. On January 24, 2017, the Administrative Court ruled in favor of the Ministry of Communications and Transportation, with the Reynosa Airport as an interested third party. In response, the plaintiff filed an amparo trial. On December 7, 2017, the court affirmed the lower court’s ruling and decided in favor of the Ministry of Communications and Transportation, with the Reynosa Airport as an interested third party. This decision concluded the trial. · Additionally, there are two amparo trials filed by a different plaintiff who claims the dispossession of property owned by the Ministry of Communications and Transportation and the declaration of nullity of the administrative act by which the plaintiff was deprived of the possession of the property, the restitution of the possessory rights, the immediate return of the property and compensation for damages. In December 2016, the Court issued the resolution for both amparo trials, pointing out that the protection of the amparo does not apply since the lands in conflict were expropriated in favor of the Mexican Government. This decision concluded the trial. 2. Ciudad Juarez airport · On November 15, 1995, parties purporting to be former owners of land comprising a portion of the Ciudad Juárez airport initiated legal proceedings against the airport to reclaim the land (240 hectares), alleging that it was improperly transferred to the Mexican government. As an alternative to recovery of this land, the claimants also sought monetary damages of U.S.$120.0 million. Within the trial, the Company challenged the claims of the claimant based on the legitimacy of the possession derived from the Concession Agreement granted by the Ministry of Communications and Transportation. The Ministry of Communications and Transportation was called to trial in defense of the interests of the Mexican government. On July 8, 2016, the local court in Ciudad Juárez ruled that the claims against the Ciudad Juárez airport are inadmissible, and on October 21, 2016, the claimants filed an appeal before the Appellate Court in Chihuahua against the court’s determination. On July 31, 2017, the First Civil Court overturned the lower court’s decision and ruled in favor of the plaintiffs, requiring the Mexican government to pay restitution to the plaintiffs for their loss of property and in accordance with the lawsuit. The Mexican government filed an amparo trial to appeal the decision. This case is currently pending. If the resolution of the trial is unfavorable for the Company, the Mexican Government will be responsible for the economic impact, as set out in the Concession Agreement. The Company has not recorded any provision regarding this trial, since it does not expect an economic impact, even in case of an unfavorable resolution. d. Conflict related to the purchase-sale of land Monterrey airport On January 12, 2012, a third party filed a claim that it was the owner of a property previously acquired by the Monterrey airport. The third party is seeking a declaration that the documents of sale to the Monterrey airport are null and void based on the absence of a sale deed for the property and the restitution of the property to the third party, together with the corresponding improvements and property rights. On August 27, 2015, a new claim was filed against the Monterrey airport in connection with the ownership of land with an approximate area of 96 hectares (107,639 square feet) acquired in 2008. The claim was filed by Banco Mercantil del Norte, S.A., acting as trustee of a transnational domain trust, arguing that the trust’s settlors are the rightful owners of the property. The claim was filed against the Monterrey airport but it was requested to call to trial the seller of the property as interested third party. The case is currently pending. The contingency is not quantified in the demand. However, if an unfavorable verdict is issued, the economic impact of the trial would be assumed by the seller of the land. The Company has not recorded any provision relating to this claim, as it is not probable that an outflow of resources embodying economic benefits will be required to settle this obligation.

Financial risk management

Financial risk management	12 Months Ended
	Dec. 31, 2017
Financial risk management
Financial risk management	21. Financial risk management a. Significant accounting policies The details of the significant accounting policies and adopted methods (including recognition, valuation and basis of recognition of related income and expenses) for each class of financial asset, financial liability and equity instrument is disclosed in note 4. b. Categories of financial instruments and risk management policies The principal categories of financial instruments are: December 31, Financial assets Risk classification 2017 2016 2015 Cash and cash equivalents and other investments held to maturity Credit and interest rate Ps. 2,382,345 Ps. 3,005,792 Ps. 2,665,641 Receivables, net Credit and exchange rate 630,757 714,130 390,785 December 31, Financial liabilities Risk classification 2017 2016 2015 Short-term and long-term debt Interest rate, exchange rate and liquidity Ps. 4,644,387 Ps. 4,707,303 Ps. 4,729,388 Trade accounts payable (1) Liquidity 249,507 252,831 243,867 Accrued interest Liquidity 69,125 43,254 42,425 Accounts payable to related parties Liquidity 130,022 140,328 67,521 (1) Does not include the payments of employee statutory profit-sharing amounts, which were Ps.6,475, Ps. 9,242 and Ps.9,491 as of December 31, 2017, 2016 and 2015, respectively. Based on the nature of its activities, the Company is exposed to different financial risks, mainly as a result of its ordinary business activities and its debt contracts entered into to finance its operating activities. The Company’s corporate treasury department provides services to the operating units to coordinate the entry into domestic and international markets and monitors and manages the financial risks relating to the operations of the Company. These risks include market risk (interest rate risk and foreign currency risk), credit risk and liquidity risk. Periodically, the Company’s management assesses risk exposure and reviews the alternatives for managing those risks, supervising and managing the financial risks through internal risk reports which analyze exposures by degree and magnitude of risks. The Board of Directors sets and monitors policies and procedures to measure and manage the risks to which the Company is exposed, which are described below. c. Market risk Interest rate risk management — This risk principally stems from changes in the future cash flows of debt entered into at variable interest rates (or with short-term maturity and presumable renewal) as a result of fluctuations in the market interest rates. The purpose of managing this risk is to lessen the impact in the cost of the debt due to fluctuations in such interest rates. The risk is managed by the Company through maintaining an appropriate combination of fixed rate loans and variable rate loans. As of December 31, 2017, the Company had an approximate Ps.4,644,387 in outstanding long-term debt, of which 96.9% had a fixed interest rate and 3.1% a variable interest rate. As of December 31, 2016, the Company had Ps.4,707,303 in outstanding long-term debt, of which 95.6% had a fixed interest rate and 4.4% a variable interest rate. As of December 31, 2015, the Company had an approximate Ps.4,729,388 in outstanding long-term debt, of which 95.1% had a fixed interest rate and 4.9% a variable interest rate. The contracted credit lines have interest payments at a variable rate, which exposes the Company to interest rate risk as a result of fluctuations in market interest rates. The risk exposure is mainly caused by the variations that could occur in the three-month LIBOR rate. The Company manages this risk by monitoring constantly the changes of such interest rates. In recent years, the three-month LIBOR has increased. The three-month LIBOR was at its lowest level on January 3, 2017 (0.99872%) and its highest level on December 28, 2017 (1.69465%). Therefore, the Company has not entered into hedging instruments to hedge the risk of a rise in such interest rates. In the future, if the behavior of the referenced rates established in its debt instruments changes and trends upward, the Company may decide to enter into hedging instruments. Sensitivity analysis for interest rates — The following sensitivity analysis is based on the assumption of an unfavorable movement of basis points in interest rates, in the indicated amounts applicable to each category of floating rate financial liabilities. The Company determines its sensitivity by applying the hypothetical interest rate (reference rate increased at the rate specified plus surcharge) for each category of financial liabilities accruing interest at a variable rate. As of December 31, 2017, 2016 and 2015, the Company maintained long-term debt, including the current portion, which accrue interest at a variable rate, of Ps.144,387, Ps.207,303 and Ps.229,388, respectively (see notes 14 and 15, which disclose the outstanding balances and interest rates of the Company’s financial instruments). A hypothetical, instantaneous and unfavorable 10% change in the three-month LIBOR interest rate applicable to the outstanding debt with variable rates would have resulted in an additional financing expense of approximately Ps.244, Ps.166 and Ps.74 for 2017, 2016 and 2015, respectively. The increase was calculated for U.S. dollar debt based on the year-end exchange rate of each year (Ps.19.7354, Ps.20.664, and Ps.17.3398 for 2017, 2016 and 2015, respectively). Exchange risk management — The Company performs transactions denominated in foreign currency; consequently, it is exposed to exchange rate risks, which are managed within the parameters of established and approved policies. The main risk related to the exchange rate involves changes in the value of the Mexican peso against the U.S. dollar. A severe devaluation or appreciation of the Mexican peso could also result in an interruption in the international currency markets and could limit the ability to transfer or convert pesos to U.S. dollars and other currencies in order to make timely payments of interest and principal on the related obligations expressed in U.S. dollars or in other currencies. While the Mexican Government does not currently restrict, and since 1982 has not restricted, the right or ability of individuals or corporations Mexican or foreign to convert pesos into U.S. dollars or other currencies persons and to transfer out of Mexico, the Mexican Government could institute restrictive exchange control policies in the future. There can be no assurance that the Bank of Mexico will maintain its current policy on the Mexican peso. The fluctuation of the currency may have an adverse effect on the financial position of the Company, results of operations and cash flows in future periods. Historically, a portion of the revenues generated by the Company’s airports (mainly derived from TUA charged to international passengers) are linked to U.S. dollars, although such revenues are collected in pesos based on the average exchange rate of the previous month. Of consolidated revenues (excluding construction services revenues) of the Company, 15.88%, 15.57% and 15.27% were from TUA of international passengers in 2017, 2016 and 2015, respectively. Substantially all other revenues of the Company are denominated in pesos. Based on an appreciation of 10% of the peso against the U.S. dollar, the Company believes that its revenues would have decreased by Ps.92,154, Ps.81,052, and Ps.63,283 in 2017, 2016 and 2015, respectively. An appreciation of the Mexican peso against the U.S. dollar would reduce the U.S. dollar-denominated revenues and the Company’s obligations under U.S. dollar-denominated debt when expressed in pesos, whereas a depreciation of the peso against the U.S. dollar would increase the Company’s U.S. dollar-denominated revenues and obligations under debt agreements when expressed in pesos. For the year ended December 31, 2017, the peso appreciated against the U.S. dollar by 4.49%, relative to the exchange rates prevailing at the end of 2016. Foreign currency sensitivity analysis - The following sensitivity analyses are based on an instantaneous and unfavorable change in exchange rates which affect the foreign currencies in which the Company’s debt is expressed. These sensitivity analyses cover all the assets and liabilities denominated in foreign currency. Sensitivity is determined by applying a hypothetical exchange rate change to those items, including the outstanding debt expressed in foreign currency. As of December 31, 2017, 2016 and 2015, a hypothetical, instantaneous and unfavorable change of 10% in the exchange rate of the peso against the U.S. dollar, applicable in the Company’s asset (liability) positions net of U.S.$25,370, U.S.$2,407 and U.S.$14,220 (amounts in thousands) would have resulted in an estimated exchange (gain) loss of approximately Ps.(50,069), Ps. 4,974 and Ps.24,657 as of December 31, 2017, 2016 and 2015, respectively. The carrying values of monetary assets and liabilities denominated in foreign currencies at the end of the reporting period are as follows (amounts in thousands): Liabilities Assets December 31, December 31, Currency 2017 2016 2015 2017 2016 2015 U.S. dollars U.S.$ (15,631) U.S.$ (14,457) U.S.$ (14,389) U.S.$ 41,001 U.S.$ 12,050 U.S.$ 169 The transactions in thousands of U.S. dollars for the years ended December 31, 2017, 2016 and 2015, are as follows: December 31, 2017 2016 2015 Technical assistance U.S.$ 6,863 U.S.$ 5,707 U.S.$ 5,641 Insurance 2,295 1,481 2,651 Purchase of machinery and maintenance 16,562 6,886 7,506 Software 1,722 1,728 1,095 Professional services, fees and subscriptions 968 1,161 607 Other 6,437 7,660 5,387 Pertinent exchange rate information at the date of the consolidated statements of financial position is as follows: December 31, 2017 2016 2015 U.S. dollar exchange rate Interbank Ps. 19.7354 Ps. 20.664 Ps. 17.3398 As of April 27, 2018, the issuance date of the consolidated financial statements, the Interbank exchange rate was Ps. 18.8644 . d. Credit risk Credit risk management — Credit risk refers to the risk whereby one of the parties defaults on its contractual obligations, thereby generating a financial loss for the Company. The objective of this risk management is to reduce its impact by reviewing the solvency of the Company’s potential customers. The creditworthiness of uncollected amounts is periodically evaluated estimates of recoverable amounts are reviewed, resulting in reserves for those amounts whose recovery is considered doubtful, with corresponding entries to the statements of income and other comprehensive income in the period of review. The credit risk has historically been very limited. The Company’s maximum credit risk exposure is presented in the amounts included in the table in subsection b) as well as within the past due but not impaired analysis of accounts receivable, included in note 7. The Company holds bonds and deposits that mitigate the credit risk, being the most relevant the guarantee deposits registered as a liability in the consolidated statements of financial position. The Company adopted a policy to only carry out transactions with solvent parties and obtain sufficient collateral where appropriate as a means of mitigating the risk of financial loss due to possible default. The Company trades only with entities that have the best possible risk rating. The credit exposure is reviewed and approved by senior management committees of the Company. The credit risk on cash and cash equivalents is limited because the counterparties are banks with high credit ratings assigned by credit rating agencies. Financial instruments that potentially expose the Company to credit risk consist mainly of accounts receivable. The customers balance is primarily comprised of TUA collected by airlines for each passenger traveling using air terminals and subsequently delivered to the Company. The Company has established three credit options: 30, 45 and 60 days. These days are granted depending on the guarantee that the customer can provide. In case of default, customers will be subject to penalty interests and/or a legal collection process. For both credit customers and cash customers, there are established guarantees, which may include the following: trust, deposit, letter of credit, liquid credit, mortgage and collateral. As of December 31, 2017, 2016 and 2015, the Company had Ps.38,223, Ps.67,482 and Ps. 67,733 as an allowance for doubtful accounts, principally related with accounts receivable. e. Liquidity risk Management of liquidity risk — This risk is generated by temporary differences between the funding required by the Company to fulfill business investment commitments, debt maturities, current asset requirements, etc., and the origin of funds generated by the regular activities of the Company and different types of bank financing. Also, different economic or industry factors, such as financial crises or suspension of operations of any airline could affect the cash flow of the Company. The objective of the Company in the management of this risk is to maintain a balance between the flexibility, period and conditions of credit facilities contracted to manage short, medium and long-term funding requirements. In this regard, the Company’s use of project financing and debt with limited resources described in note 14 and the short-term financing for working capital of current assets are significant. The Executive Committee of the Company is ultimately responsible for liquidity management. This Committee has established an appropriate framework for liquidity management guidelines. The Company manages its liquidity risk by maintaining reserves, adequate financial facilities and adequate loans, while constantly monitoring projected and actual cash flows and reconciling the maturity profiles of financial assets and liabilities. Additionally, as mentioned in note 14, the Company has available credit lines for working capital. The following table shows the remaining contractual maturities of the Company’s financial liabilities with agreed repayment periods. This table has been prepared based on the projected non-discounted cash flows of financial liabilities at the date on which the Company will make payments. The table includes projected interest cash flows and capital repayments of financial debt included in the consolidated statement of financial position. To the extent that interest is accrued at variable rates, the non-discounted amount is derived from interest rate curves at the end of the reporting period. Contractual maturity is based on the earliest date when the Company must make the respective payment. 2025 and As of December 31, 2017 2018 2019-2021 2022-2024 subsequently Total Long-term debt Ps. 50,852 Ps. 3,093,535 Ps. 1,500,000 Ps. — Ps. 4,644,387 Interest (1) 310,710 806,984 118,078 — 1,235,772 Trade accounts payable 249,507 — — — 249,507 Accrued expenses 69,125 — — — 69,125 Accounts payable with related parties 130,022 — — — 130,022 Total Ps. 810,216 Ps. 3,900,519 Ps. 1,618,078 Ps. — Ps. 6,328,813 2024 and To December 31, 2016 2017 2018-2020 2021-2023 subsequently Total Long-term debt Ps. 56,122 Ps. 137,166 Ps. 3,014,015 Ps. 1,500,000 Ps. 4,707,303 Interest (1) 313,145 929,050 287,120 19,680 1,548,995 Trade accounts payable 252,831 — — — 252,831 Accrued expenses 43,254 — — — 43,254 Accounts payable with related parties 140,328 — — — 140,328 Total Ps. 805,680 Ps. 1,066,216 Ps. 3,301,135 Ps. 1,519,680 Ps. 6,692,711 2023 and As of December 31, 2015 2016 2017-2019 2020-2022 subsequently Total Long-term debt Ps. 55,433 Ps. 128,337 Ps. 3,045,618 Ps. 1,500,000 Ps. 4,729,388 Interest (1) 312,296 931,603 595,794 19,680 1,859,373 Trade accounts payable 243,867 — — — 243,867 Accrued expenses 42,425 — — — 42,425 Accounts payable with related parties 67,521 — — — 67,521 Total Ps. 721,542 Ps. 1,059,940 Ps. 3,641,412 Ps. 1,519,680 Ps. 6,942,574 (1) The projected interest is determined based on LIBOR and assuming an exchange rate of Ps.19.7354, Ps.20.664 and Ps.17.3398 (as of December 31, 2017, 2016 and 2015, respectively) per U.S. $1.00. The amounts forming part of the debt contracted with credit institutions include fixed and variable rate instruments. Variable-rate financial liabilities are subject to change when variable interest rates differ from the estimated interest rates determined at the end of the reporting period based on their market value. The Company expects to meet its obligations under its liabilities with its operational cash flows and resources received from the maturity of its financial assets. Additionally, the Company has access to lines of credit with certain financial institutions. f. Financial instruments at fair value This note provides information about how the Company determines fair values of various financial assets and financial liabilities. Except as detailed in the following table, the Company considers that the carrying amounts of financial assets and financial liabilities recognized in the consolidated financial statements approximate their fair values due to their short-term maturities. Financial liabilities Long-term debt December 31, 2017 December 31, 2016 December 31, 2015 Book value Fair value Book value Fair value Book value Fair value Ps. 4,644,387 Ps. 4,465,684 Ps. 4,707,303 Ps. 4,489,119 Ps. 4,729,388 Ps. 4,655,234 Hierarchy of fair value as of December 31, 2017 Level 1 Level 2 Level 3 Total Financial liabilities: Long-term debt (1) Ps. 4,246,875 Ps. 218,809 Ps. — Ps. 4,465,684 Hierarchy of fair value as of December 31, 2016 Level 1 Level 2 Level 3 Total Financial liabilities: Long-term debt (1) Ps. 4,204,695 Ps. 284,424 Ps. — Ps. 4,489,119 Hierarchy of fair value as of December 31, 2015 Level 1 Level 2 Level 3 Total Financial liabilities: Long-term debt (1) Ps. 4,384,607 Ps. 270,627 Ps. — Ps. 4,655,234 (1) The fair values of the financial assets and financial liabilities included in the level 2 category above have been determined in accordance with generally accepted pricing models based on a discounted cash flow analysis, with the most significant inputs being the discount rate that reflects the credit risk of counterparties.

Shareholders' equity

Shareholders' equity	12 Months Ended
	Dec. 31, 2017
Shareholders' equity
Shareholders' equity	22. Shareholders’ equity a. Capital management The objectives of the Company with respect to capital management is to maintain an optimum financial-net worth structure, to reduce capital costs and safeguard its capacity to continue its operations with solid indebtedness ratios. The Company is not subject to any externally imposed requirements for managing capital. The Company manages its capital to ensure its ability to maximize the return on investment of its shareholders through three primary strategic objectives, as follows: 1. Cost and expense optimization – Indicators of this objective are evaluated, excluding construction costs and the maintenance provision, as such amounts do not affect cash flows. This indicator allows management to assess the ratio of costs and expenses to revenues. 2. Increased cash flows and optimization of the consolidated financial position. 3. Revenue growth — For this purpose, the Company monitors indicators associated with aeronautical and non-aeronautical revenues. On a monthly basis, the Company’s management provides quarterly updates to the Strategic Planning Committee to Empresas ICA, who provides oversight and reviews compliance with this objective. The Strategic Planning Committee assesses and reviews these objectives on a quarterly basis. As part of the review, this Committee considers the cost of capital and risks associated with the Company’s strategic objectives. b. As of December 31, 2017, there were 49,766,000 series BB shares and 344,004,973 series B shares. c. As of December 31, 2016 and 2015, there were 49,766,000 series BB shares and 350,234,000 series B shares. d. Subscribed and paid-in capital stock as of December 31, 2017, 2016 and 2015, is comprised of ordinary, nominal shares, composed as follows: December 31, 2017 Number of Shares Contributed Capital Fixed capital: Series B Class I 344,004,973 Ps. 265,269 Series BB Class I 49,766,000 38,375 Treasury Series B Class I shares (324,507) (250) 393,446,466 Ps. 303,394 December 31, 2016 Number of Shares Contributed Capital Fixed capital: Series B Class I 350,234,000 Ps. 270,071 Series BB Class I 49,766,000 38,375 Treasury Series B Class I shares (6,229,027) (4,802) 393,770,973 Ps. 303,644 December 31, 2015 Number of Shares Contributed Capital Fixed capital: Series B Class I 350,234,000 Ps. 270,071 Series BB Class I 49,766,000 38,375 Treasury Series B Class I shares (7,843,623) (6,048) 392,156,377 Ps. 302,398 e. At the Ordinary Shareholders’ Meetings held on April 28, 2017, April 14, 2016 and April 23, 2015, the results for the years ended December 31, 2016, 2015 and 2014, respectively, were approved . f. At the Extraordinary General Shareholders’ Meeting held on May 31, 2017, the cancellation of 6,229,027 Series B Treasury shares, representing the minimum fixed portion of the Company’s capital stock was approved. This cancellation does not result in a refund in favor of the shareholders. g. In 2017, 2016 and 2015, (324,507), 1,614,596, and (3,223,473) shares were (repurchased) issued by the Company for Ps.(34,234) Ps.184,370, and Ps.(244,293), of nominal value, respectively. As of December 31, 2017, 2016 and 2015, the market price per share was Ps. 101.67, Ps. 89.38 and Ps.83.61, respectively. As of December 31, 2017, the Company had in treasury repurchased shares in the amount of Ps. 34,234. Such amount is represented by 324,507 Series B Class I shares. h. At the Ordinary General Shareholders’ Meeting held on April 28, 2017 the shareholders approved the following: (1) the payment of a cash dividend of Ps. 1,600 million, to be paid in a single installment of Ps. 4.00s per share (the amount effectively paid was Ps. 1,575,083), corresponding to the shares outstanding less the treasury stock at the payment date (May 16, 2017); (2) a share repurchase reserve of Ps.1,500 million and authorized use of up to that amount to repurchase Series B shares during 2018 and until the next annual meeting approves the 2017 result, for which an amount of Ps.116,876 was transferred from accumulated results to the share repurchase reserve for completion of the amount approved. i. At the Ordinary Shareholders’ Meeting held on April 14, 2016, the shareholders approved the following: (1) the payment of a cash dividend of Ps. 1,400 million, to be paid in a single installment of Ps. 3.50 per share (the amount effectively paid was Ps. 1,371,641), corresponding to the shares outstanding less the treasury stock at the payment date (April 29, 2016); (2) a share repurchase reserve of Ps.1,200 million and authorized use of up to that amount to repurchase shares during 2016 and until the next annual meeting approves the 2016 result, and (3) a decrease in the legal reserve fund of Ps. 176,530, an amount in which the reserve exceeds 20% of the share capital and transfer it to results from previous years. j. At the Ordinary and Extraordinary Shareholders’ Meetings held on April 23, 2015, the shareholders approved the following: (1) an increase in the Company’s legal reserve fund of Ps. 17,704, and (2) a decrease in the fixed portion of the Company’s capital stock in the amount of Ps. 1,200,000, to be conducted without decreasing the number of shares, by reimbursing the shareholders in the amount of Ps. 3.00 per share. The amount paid to shareholders was Ps. 1,184,834 and the remaining Ps. 15,166 corresponds to shares in treasury. In addition, the shareholders approved a share repurchase reserve of up to Ps. 241,543 and the use of such funds for share repurchases. k. Shareholders’ equity, except restated paid-in capital and tax-retained earnings, will be income tax on dividends by the Company to the effect upon the distribution rate. Any tax paid on such distribution may be credited against income tax for the year in which the tax on dividends and the following two years, against the tax for the year and interim payments thereof is paid. l.

Accumulated other comprehensive

Accumulated other comprehensive loss	12 Months Ended
	Dec. 31, 2017
Accumulated other comprehensive loss
Accumulated other comprehensive loss	23. Accumulated other comprehensive income Accumulated other comprehensive income (loss) is as follows: Labor obligations Amount Deferred taxes Total Balance as of January 1, 2015 Ps. (13,727) Ps. 4,102 Ps. (9,625) Movements of the year (1,286) 386 (900) Balance as of December 31, 2015 (15,013) 4,488 (10,525) Movements of the year 3,533 (1,060) 2,473 Balance as of December 31, 2016 (11,480) 3,428 (8,052) Movements of the year (4,199) 1,260 (2,939) Balance as of December 31, 2017 Ps. (15,679) Ps. 4,688 Ps. (10,991) Other comprehensive loss is comprised of the effects of labor obligations.

Other income

Other income	12 Months Ended
	Dec. 31, 2017
Other income
Other income	24. Other income Other income, net, consists of the following: Year ended December 31, 2017 2016 2015 Gain on sale of equipment Ps. (1,340) Ps. (22,250) Ps. (140) Insurance recovery (40) — (6,790) Ps. (1,380) Ps. (22,250) Ps. (6,930)

Related party balances and tran

Related party balances and transactions	12 Months Ended
	Dec. 31, 2017
Disclosure of transactions between related parties [abstract]
Related party balances and transactions	25. Related party balances and transactions a. The repayments for construction to the related parties are as follows: December 31, 2017 2016 2015 ICA Constructora de Infraestructura, S.A. de C.V. (2) Ps. 44,254 Ps. — Ps. — ICA Constructora, S.A. de C.V. (2) 44,264 — — Actica Sistemas, S.A. de C.V. (2) 5,887 — — Ingenieros Civiles Asociados, S.A. de C.V. (2) — 37,866 1,110 VCD Construcción y Desarrollo, S.A.P.I. de C. V. (2) 3,612 8,166 — Ps. 98,017 Ps. 46,032 Ps. 1,110 b. The accounts payable with related parties are as follows: December 31, Payable: 2017 2016 2015 Empresas ICA, S.A.B. de C.V. “EMICA” (1) Ps. — Ps. 18,763 Ps. 10,558 Servicios de Tecnología Aeroportuaria, S.A. de C.V. “SETA” (2) 82,501 74,266 41,287 Nacional Hispana Hoteles, S. de R. L. de C. V. (2) — 5,316 14,559 Operadora Nacional Hispana, S.A. de C.V. (2) 7,985 6,110 — VCD Construcción y Desarrollo, S.A.P.I. de C.V. (2) 4,773 26,325 — ICA Ingeniería S. A. de C. V. (2) 367 7,155 — Actica Sistemas, S. de R.L. de C.V. 1,496 1,760 — Grupo ICA, S.A. de C.V. 16,592 — — GGA Capital, S.A.P.I. de C.V. 14,700 — — ICA Constructora de Infraestructura, S.A. de C.V. 783 — — Grupo Hotelero Santa Fe, S. A. de C. V. (2) 825 633 1,117 Ps. 130,022 Ps. 140,328 Ps. 67,521 (1) Holding Company (2) Affiliated company c. The principal transactions with related parties performed in the normal course of business, are as follows: Year ended December 31, 2017 2016 2015 Capital Investment: SAP Ps. — Ps. — Ps. 10,706 Hotel — 340 — Industrial warehouse 46,172 103,235 29,067 Expenses: Technical assistance payments received 135,074 117,987 97,818 Administrative services 66,783 51,950 22,061 Major maintenance and improvements on concessioned assets: Platform 10,405 — 3,162 Runway — — 29,089 Improvements to concessioned assets: Construction terminal 210,098 — — Platform — 21,694 — Remuneration to directors and officers who sit on the Board of Directors and Executive, Audit, Corporate Governance, Finance and Sustainability Committees totaled Ps.15,283, Ps.15,030 and Ps.14,725 for 2017, 2016 and 2015, respectively. In addition, remuneration to the Chairman of the Board totaled Ps.5,251, Ps.4,970 and Ps.4,675 for 2017, 2016 and 2015, respectively. Employee Benefits — Employee benefits granted to key management personnel of the Company were comprised solely of short-term benefits of Ps.70,413, Ps.74,706 and Ps.75,487 in 2017, 2016 and 2015, respectively. Technical Assistance — On May 13, 2015, the Company signed an extension and amendment to its Technical Assistance Agreement. The annual consideration under the amendment is the greater of U.S.$ 3,478,000 (updated annually according to the U.S. consumer price index) and 4% of the Company’s consolidated EBITDA before payment of the technical assistance fee for the first three years or 3% of consolidated EBITDA before payment of the technical assistance fee during the last two years. For purposes of this calculation, consolidated EBITDA is calculated prior to deducting the technical assistance fee and considers airport concession operations, as well as subsidiaries that provide employee services to airports directly or indirectly, exclusively. In 2017, 2016 and 2015, the variable consideration was greater than the fixed consideration, at U.S. $3,517,000, U.S. $3,478,000 and U.S. $3,482,000, respectively. As of December 31, 2015, SETA’s shareholders were CONOISA with 74.5% and Aéroports de Paris Management, S. A. (ADPM) with 25.5%. Pursuant to the Company’s bylaws, SETA (as holder of the Company’s Series “BB” shares) has the ability to appoint and remove the Company’s Chief Financial Officer, Chief Operating Officer and Commercial Director, the right to elect three members of the Company’s board of directors, and the right to veto certain actions requiring approval of the Company’s shareholders (including the payment of dividends and the right to appoint certain members of senior management). In the event of the termination of the technical assistance agreement, the Series “BB” shares will be converted into Series “B” shares resulting in the termination of these rights. If at any time after June 14, 2015, SETA were to hold less than 7.65% of the Company’s capital stock in the form of Series “BB” shares, such shares must be converted into Series “B” shares, which would cause SETA to lose all of its special rights. So long as SETA retains at least 7.65% of the Company’s capital stock in form of Series “BB” shares, all its special rights will remain in force. SETA must maintain 51% of its shareholding in GACN, acquired under the purchase agreement for a term of 7 years as from the date of the participation agreement (the “seven-year waiting period”) and the remaining 49% during a three-year waiting period, as the case may be, assuming that at the end of the seven-year waiting period, SETA may sell to third parties annually up to one-eighth of 51% of its shareholding in GACN, and at the end of the three-year waiting period or the five-year waiting period, as the case may be, SETA may sell or otherwise transfer unrestricted shares held by GACN in excess of 51% (fifty one percent) of its equity stake. ADPM announced its decision to exercise its option to exchange its 25.5% shareholding in SETA, the strategic partner of GACN, for GACN B shares held by SETA, which represent 4.3% of GACN’s total equity, and of its intention to sell this equity interest in GACN through an international private placement outside Mexico, which was successfully concluded in October 2016 SETA remained GACN’s strategic partner. Upon completion of the transactions, ICA’s wholly-owned subsidiary CONOISA became the indirect shareholder of 100% of SETA’s capital stock, which in turn holds 12.6% of GACN, all in the form of BB shares. In addition, CONOISA owns 1.9% of GACN’s B shares directly.

Operating segment data

Operating segment data	12 Months Ended
	Dec. 31, 2017
Operating segment data
Operating segment data	26. Operating segment data The reportable segments are determined on the basis of which the Company internally reports its segment reporting to senior management for purposes of making operating decisions. Considering the same accounting basis described in note 4, for the purpose of allocating resources and assessing segment performance, segments are presented at their most detailed level of operating segments, such that each airport, hotel and industrial park is considered a reportable segment. The financial information of the holding company and its service companies, have been combined and included in the “other” column. The information by operating segment is presented considering internal reports on the business units of the Company, which are revised regularly by the Company’s management for purposes of operational decision making in order to allocate resources to a segment and evaluate its performance. Construction Depreciation Major Allowance for Investments Aeronautical Non-aeronautical services and maintenance doubtful Operating Interest Interest Assets per Liabilities per Capital in airport December 31, 2017 revenues revenues revenues amortization provision accounts income expense income Income tax segment segment investments concessions Metropolitan Monterrey Ps. 2,046,097 Ps. 547,586 Ps. 367,214 Ps. 84,132 Ps. 72,284 Ps. (4,263) Ps. 518,737 Ps. 7,975 Ps. (24,111) Ps. 100,978 Ps. 4,993,403 Ps. 826,644 Ps. 505,445 Ps. 2,785,385 Tourist Acapulco 158,448 34,089 372,253 20,105 8,475 (1,443) 38,531 4,764 (4,845) (648) 1,197,164 282,120 372,253 996,944 Mazatlán 249,479 47,819 30,205 15,815 16,913 (168) 59,470 4,259 (20,699) 15,213 1,128,244 150,567 30,223 508,123 Zihuatanejo 167,550 27,334 28,039 17,347 20,566 (445) 38,977 9,886 (7,494) 4,367 596,780 116,609 28,138 520,632 Regional Chihuahua 308,746 52,742 122,412 12,682 18,446 (4) 72,298 12,251 (21,242) 17,271 903,724 213,533 122,448 460,816 Culiacan 409,399 53,296 43,362 16,147 10,368 (1,159) 92,556 7,637 (7,940) 20,847 816,623 126,234 44,389 508,523 Durango 100,884 11,061 19,974 6,140 18,130 282 22,389 6,712 (8,174) 954 292,704 67,734 19,991 170,869 San Luis Potosi 149,823 24,603 108,756 7,934 29,556 (1,275) 29,078 4,791 (8,272) 7,570 449,272 232,186 108,756 316,361 Tampico 171,550 25,859 46,740 7,697 14,583 (1,627) 39,483 2,674 (3,441) 8,418 316,409 83,646 46,740 254,622 Torreon 156,158 22,478 20,018 8,726 19,361 (59) 35,743 8,382 (9,902) 7,019 371,887 111,569 20,018 264,450 Zacatecas 95,153 12,172 19,175 6,815 19,843 46 19,354 3,487 (4,465) 3,495 276,803 90,328 19,175 208,814 Border Ciudad Juarez 244,891 40,676 31,917 11,103 31,042 (95) 57,113 4,441 (10,987) 13,507 480,320 124,745 33,404 355,659 Reynosa 104,311 15,094 127,353 6,616 11,471 (362) 23,881 — 1,313 2,819 440,857 208,144 127,353 305,411 Hotel NH T2 Hotel — 250,777 — 20,799 — — 75,797 5,537 (876) 15,454 289,844 32,374 1,338 — Hilton Garden Inn — 90,875 — 10,111 — 54 25,680 2,329 (3,857) 3,753 250,264 8,857 9,090 — Industrial Park: VYNMSA — 12,914 — 9,200 — — (1,767) 373 (2,034) (3,053) 242,220 43,260 70,726 — Other — 4,034,440 — 37,836 — (43) 3,353,545 317,471 (40,411) 595,109 13,789,549 5,756,750 30,664 — Total 4,362,489 5,303,815 1,337,418 299,205 291,038 (10,561) 4,500,865 402,969 (177,437) 813,073 26,836,067 8,475,300 1,590,151 7,656,609 Eliminations (15,458) (3,847,477) (10,960) — — — (1,261,746) (50,147) 50,147 — (12,635,267) (1,503,815) (8,192) (8,192) Consolidated Ps. 4,347,031 Ps. 1,456,338 Ps. 1,326,458 Ps. 299,205 Ps. 291,038 Ps. (10,561) Ps. 3,239,119 Ps. 352,822 Ps. (127,290) Ps. 813,073 Ps. 14,200,800 Ps. 6,971,485 Ps. 1,581,959 Ps. 7,648,417 Construction Depreciation Major Allowance for Investments Aeronautical Non-aeronautical services and maintenance doubtful Operating Interest Interest Assets per Liabilities per Capital in airport December 31, 2016 revenues revenues revenues amortization provision accounts income expense income Income tax segment segment investments concessions Metropolitan Monterrey Ps. 1,799,823 Ps. 560,016 Ps. 97,631 Ps. 76,016 Ps. 64,794 Ps. (1,417) Ps. 473,916 Ps. 1,136 Ps. (39,945) Ps. 119,677 Ps. 4,868,188 Ps. 658,768 Ps. 98,585 Ps. 2,492,242 Tourist Acapulco 149,214 30,446 76,772 19,466 2,934 (521) 39,461 411 (13,246) 5,197 1,085,908 113,528 77,069 641,082 Mazatlán 221,522 46,879 19,527 15,458 12,490 (196) 55,052 428 (27,820) 14,978 1,021,766 128,287 19,632 492,692 Zihuatanejo 141,091 26,280 25,699 16,680 17,170 85 35,945 932 (7,736) 5,705 596,541 114,706 25,822 507,683 Regional Chihuahua 272,921 48,374 16,061 11,853 28,066 (1,011) 64,258 2,102 (23,510) 20,277 793,881 170,004 16,202 349,021 Culiacan 351,096 48,280 9,608 16,006 11,251 764 79,875 383 (8,017) 20,524 726,063 117,342 9,896 479,351 Durango 98,550 11,026 4,381 5,965 14,649 (286) 19,017 — (5,739) 4,200 290,258 58,281 4,478 155,540 San Luis Potosi 130,337 23,666 24,456 7,105 28,384 711 30,801 — (13,166) 11,286 293,618 89,123 24,553 214,064 Tampico 162,389 22,735 32,053 6,567 10,782 1,907 37,025 — (3,016) 10,685 306,466 90,438 32,157 214,318 Torreon 151,251 20,087 5,722 8,515 16,916 186 34,268 9 (8,265) 10,537 372,001 90,046 5,834 251,932 Zacatecas 87,616 10,120 7,677 6,656 17,315 (2) 19,547 150 (8,396) 6,891 286,407 74,939 7,789 195,325 Border Ciudad Juarez 208,042 34,351 9,905 10,334 24,025 507 48,478 147 (12,530) 14,819 452,024 111,710 10,005 334,050 Reynosa 113,506 14,150 23,847 6,290 19,240 212 25,539 179 (7,364) 7,923 282,249 67,237 23,944 183,446 Hotel NH T2 Hotel — 227,884 — 20,739 — 240 68,595 11,497 (639) 15,505 290,685 85,543 2,095 — Hilton Garden Inn — 83,625 — 9,268 — — 22,222 2,171 (986) 4,244 234,123 15,996 13,410 — Industrial Park: VYNMSA — 4,952 — 3,416 — — (3,063) — (238) (1,315) 194,209 32,577 104,326 — Other — 4,847,425 — 36,300 — (430) 2,843,210 345,728 (53,566) 475,649 13,052,525 5,554,128 62,163 — Total 3,887,358 6,060,296 353,339 276,634 268,016 749 3,894,146 365,273 (234,179) 746,782 25,146,912 7,572,653 537,960 6,510,746 Eliminations (14,623) (4,727,534) (8,567) — (5,145) — (1,110,592) (34,579) 34,579 — (11,601,589) (714,310) (8,567) 2,768 Consolidated Ps. 3,872,735 Ps. 1,332,762 Ps. 344,772 Ps. 276,634 Ps. 262,871 Ps. 749 Ps. 2,783,554 Ps. 330,694 Ps. (199,600) Ps. 746,782 Ps. 13,545,323 Ps. 6,858,343 Ps. 529,393 Ps. 6,513,514 Construction Depreciation Major Allowance for Investments Aeronautical Non-aeronautical services and maintenance doubtful Operating Interest Interest Assets per Liabilities per Capital in airport December 31, 2015 revenues revenues revenues amortization provision accounts income expense income Income tax segment segment investments concessions Metropolitan Monterrey Ps. 1,443,311 Ps. 484,111 Ps. 70,999 Ps. 76,353 Ps. 24,327 Ps. 293 Ps. 365,471 Ps. 4,044 Ps. (11,285) Ps. 91,560 Ps. 4,501,117 Ps. 626,259 Ps. 73,221 Ps. 2,464,006 Tourist Acapulco 138,309 27,864 81,869 18,737 21,621 (133) 21,329 832 (7,663) 1,582 1,044,502 113,932 84,354 587,517 Mazatlán 168,703 40,820 41,487 14,487 (4,949) (576) 40,170 5,283 (16,671) 10,389 934,612 100,921 43,502 487,516 Zihuatanejo 118,736 23,751 57,943 15,073 (73) (203) 27,338 2,731 (284) 3,844 605,538 148,768 60,483 496,394 Regional Chihuahua 196,033 40,204 3,769 12,025 30,246 934 26,553 (1,888) (11,847) 8,991 721,935 159,632 3,933 342,739 Culiacan 255,921 39,981 34,058 15,899 23,338 (102) 40,763 12,319 (1,911) 8,843 683,797 141,263 35,579 487,393 Durango 63,186 9,080 2,992 5,867 23,868 392 10,991 (6,799) (259) 3,513 281,816 64,356 4,948 155,568 San Luis Potosi 99,341 20,482 4,668 7,431 (16,415) 757 22,686 1,859 (437) 7,575 287,251 117,833 4,760 195,097 Tampico 144,178 22,810 9,589 6,655 21,551 (2,146) 32,793 4,361 (1,389) 2,284 276,428 84,117 9,691 187,509 Torreon 110,480 18,191 14,796 8,484 1,431 (339) 25,065 (3,238) (1,120) 7,392 361,616 111,837 14,849 253,471 Zacatecas 66,957 9,304 10,294 6,719 10,768 (1,193) 11,601 (2,559) (439) 3,433 279,613 89,086 10,488 193,119 Border Ciudad Juarez 146,201 29,225 9,512 10,658 29,265 775 28,593 1,240 (1,195) 7,890 424,666 94,148 11,391 333,676 Reynosa 95,742 12,557 6,012 6,127 9,315 (278) 14,373 (954) (284) 3,144 263,490 73,408 6,384 164,600 Hotel NH T2 Hotel — 212,488 — 20,506 — — 60,142 14,536 (595) 14,830 311,178 149,555 1,605 — Hilton Garden Inn — 16,882 — 1,163 — — (984) 369 (583) (634) 212,412 10,984 95,078 — Other — 3,639,434 — 12,625 — 716 1,916,865 342,813 (65,028) 337,238 11,673,674 5,503,723 88,080 — Total 3,047,098 4,647,184 347,988 238,809 174,293 (1,103) 2,643,749 374,949 (120,990) 511,874 22,863,645 7,589,822 548,346 6,348,605 Eliminations (13,968) (3,535,643) — — — — (607,194) (40,185) 40,250 236 (10,353,309) (1,030,013) — — Consolidated Ps. 3,033,130 Ps. 1,111,541 Ps. 347,988 Ps. 238,809 Ps. 174,293 Ps. (1,103) Ps. 2,036,555 Ps. 334,764 Ps. (80,740) Ps. 512,110 Ps. 12,510,336 Ps. 6,559,809 Ps. 548,346 Ps. 6,348,605

Revenues

Revenues	12 Months Ended
	Dec. 31, 2017
Revenue [abstract]
Revenues	27. Revenues According to the General Airports Law on Airports and its regulations, Company revenues are classified as aeronautical services and non-aeronautical services. Aeronautical services include those services provided to airlines and passengers as well as complementary services. Non-aeronautical services include those services that are not essential for operating an airport, such as the lease of commercial premises, restaurants and banks. Revenues generated by aeronautical services are under a price regulation system administered by the Ministry of Communications and Transportation for airport concessions, which establishes a maximum rate (TM) for each year in a five-year period. The TM is the maximum amount of revenue per “work load unit” that may be earned at an airport each year from regulated sources. Under this regulation, a work load unit is equivalent to one passenger (excluding transit passengers) or 100 kilograms (220 pounds) of cargo. Non-aeronautical services are not covered by the regulation system administered by the Ministry of Communications and Transportation. However, in some cases, they may be regulated by other authorities, as is the case with revenues generated from the operation of parking lots. Under the General Airports Law and its regulations, revenues generated from the operation of parking lots are considered aeronautical revenues. For purposes of these financial statements, such revenues are classified as non-aeronautical. Following is a detail of the composition of revenues of the Company, using the classification established by the General Airports Law and its related regulations, with the exception of non-aeronautical revenues as mentioned in the preceding paragraph: Year ended December 31, 2017 2016 2015 Aeronautical services: Domestic TUA Ps. 2,801,751 Ps. 2,477,711 Ps. 1,863,875 International TUA 921,539 810,519 632,834 Landing charges 178,638 167,298 150,739 Platform for embarking and disembarking 119,123 118,004 107,465 Aircraft parking charges on extended stay or overnight 31,923 33,242 30,284 Domestic and international passenger and carry-on baggage check 48,762 37,925 36,433 Aerocars and jetways 44,234 40,715 38,983 Other airport services, leases and regulated access rights (3) 201,061 187,321 172,517 Total revenues from aeronautical services (1) Ps. 4,347,031 Ps. 3,872,735 Ps. 3,033,130 Year ended December 31, 2017 2016 2015 Non-aeronautical services: Commercial activities Car parking charges Ps. 200,948 Ps. 192,063 Ps. 181,631 Advertising (2)(3) 106,045 120,591 115,579 Retail operations (2)(3) 106,908 97,631 75,975 Food and beverage (2)(3) 101,577 85,995 67,187 Car rental operators (2)(3) 92,770 75,966 60,168 Time share developers (2)(3) 13,193 13,967 12,283 Financial services (2)(3) 7,418 6,457 5,930 Communication and services (2)(3) 13,604 10,362 13,120 Services to passengers 2,662 2,803 2,669 VIP lounges 20,453 16,937 10,119 Loyalty program - 911 1,772 Other services 31,420 26,787 23,421 Total revenue from commercial activities 696,998 650,470 569,854 Diversification activities: Hotel services 340,279 311,679 229,352 OMA Carga 152,963 132,211 107,443 Real estate services 12,328 12,988 10,966 Industrial services 14,647 4,952 — Other services 4,405 5,852 2,088 Total diversification activities 524,622 467,682 349,849 Complementary activities : Leasing of space (2)(3) 73,575 67,784 69,376 Access rights 16,538 13,984 11,156 Documented baggage inspection 132,262 121,400 99,974 Other services (CUSS and CUTE) (4) 12,343 11,442 11,332 Total of complimentary activities 234,718 214,610 191,838 Total revenue from non-aeronautical services Ps. 1,456,338 Ps. 1,332,762 Ps. 1,111,541 (1) For the year ended December 31, 2017, 2016 and 2015, includes incentives given to airlines for Ps. 62,048, Ps.11,759, and Ps.245,553, respectively. (2) These revenues are considered as commercial concessions. (3) Revenues from commercial concessions and complementary activities are generated principally based on the terms of Company’s operating lease agreements. Lease agreements are based on either a monthly rent (which generally increases each year based on the NCPI) and/or the greater of a monthly minimum guaranteed rent or a percentage of the lessee’s monthly revenues. Monthly rent and minimum guaranteed rent are included under the caption “Commercial concessions” above. (4) Corresponds to other revenues for complementary activities, primarily Common-Use Self Service (CUSS), revenues from passengers’ self-service kiosks, and Common-Use Terminal Equipment (CUTE) corresponds to revenues from shared terminal equipment for the airlines’ use located in terminal gates Approximately 82%, 75%, and 77% of consolidated revenues for the years ended December 31, 2017, 2016 and 2015, respectively, were generated by the Monterrey, Acapulco, Mazatlán, Culiacan, Chihuahua, Ciudad Juarez, and Zihuatanejo airports.

Cost of services

Cost of services	12 Months Ended
	Dec. 31, 2017
Cost of services
Cost of services	28. Cost of services The cost of services is as follows: Year ended December 31, 2017 2016 2015 Wages and salaries Ps. 219,890 Ps. 203,912 Ps. 191,660 Maintenance 184,246 157,740 147,923 Security and insurance 176,197 167,678 153,011 Utilities (electric, cleaning and water) 189,238 158,956 135,825 Building lease 45,181 41,031 38,265 Allowance for doubtful accounts (10,561) 749 (1,103) Cost of hotel service 65,034 58,607 42,742 Employee statutory profit sharing 1,568 2,121 2,411 Equipment lease, fees and others 110,272 109,347 125,399 Ps. 981,065 Ps. 900,141 Ps. 836,133

Significant accounting polici33

Significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2017
Significant accounting policies
Foreign currency transactions	b. Foreign currency transactions Foreign currency transactions are recorded at the exchange rate in effect at the date of the transaction date. Monetary assets and liabilities denominated in foreign currency are translated into Mexican pesos at the exchange rate prevailing at the end of the reporting period. Non-monetary items that are measured in terms of historical cost in a foreign currency are not retranslated. Exchange fluctuations are recorded in profit or loss, except for exchange differences on foreign currency borrowings relating to assets under construction for future productive use, which are included in the cost of those assets when they are regarded as an adjustment to interest costs on those foreign currency borrowings.
Cash and cash equivalents	c. Cash and cash equivalents Cash and cash equivalents consist mainly of bank deposits in checking accounts and short-term investments, highly liquid and easily convertible into cash, maturing within three months as of their acquisition date, which are subject to immaterial value change risks. Cash is stated at nominal value and cash equivalents are measured at fair value.
Property, leasehold improvements and equipment, net	d. Property, leasehold improvements and equipment, net Expenditures for property, leasehold improvements and equipment acquired are carried at acquisition cost. Depreciation is recognized so as to write off the cost or deemed cost of assets (other than freehold land and properties under construction). Depreciation of property, leasehold improvements and equipment is calculated using the straight-line method over the useful life of the asset, taking into consideration the related asset’s residual value. Depreciation begins in the month in which the asset is placed in service. The useful lives of assets are as follows: Useful Life (years) Improvement in leased assets 20 Machinery and equipment 10 Furniture and office equipment 10 Transportation equipment 4 Computer equipment 3.3 The depreciation of property, leasehold improvements and equipment is recorded in results. Disposal of assets The gain or loss on the sale or retirement of an item of property and equipment is calculated as the difference between the proceeds from the sale and the carrying value of the asset and is recognized in income when all risks and rewards of ownership of the asset is transferred to the buyer, which generally occurs when ownership of the asset is transferred to the buyer. Replacements or renewals of a component of property or equipment that extend the useful life of the asset, or its economic capacity, are recognized as an increase to property and equipment, with the subsequent write-off or derecognition of the assets replaced or renewed. Construction in progress for leasehold improvement Construction in progress for leasehold improvement is carried at cost less any recognized impairment loss. Cost includes professional fees and, in the case of qualifying assets, borrowing costs capitalized in accordance with the Company’s accounting policy. Such properties are transferred to the appropriate categories of property and equipment when completed and ready for intended use. The depreciation of these assets, as well as other properties, begins when the assets are ready for use. Subsequent costs Subsequent costs form part of the value of the asset or are recognized as a separate asset only when it is probable that such disbursement represents an increase in productivity, capacity, efficiency or an extension of the life of the asset, and the cost of the item can be determined reliably. All other expenses, including repairs and maintenance, are recognized in comprehensive income as incurred.
Leasing	e. Leasing Leases are classified as finance leases whenever the terms of the lease transfer substantially all the risks and rewards of ownership to the lessee. All other leases are classified as operating leases. Operating leasing As lessor Rental income from operating leases is recognized on a straight-line basis over the term of the relevant lease. Initial direct costs incurred in negotiating and arranging an operating lease are added to the carrying amount of the leased asset and recognized in profit using the same criteria used for the recognition of lease income. As lessee Any payment or collection made upon execution of an operating lease is treated as an advanced payment or collection that is recognized in results over the lease term, as the benefits of the leased asset are received or transferred. The costs and expenses arising under operating leases are recognized in results using the straight-line method during the term of the lease. Contingent rentals arising under operating leases are recognized as an expense in the period in which they are incurred.
Guarantee deposits	f. Guarantee deposits Guarantee deposits correspond to amounts received from lessees to guarantee performance under the lease. They are recorded at cost and are either returned to tenants at the end of the lease term or recognized against services unpaid by tenants. Additionally, certain agreements were entered into with airlines, which established escrow deposits paid by the airlines to guarantee their obligation for payment of the amounts collected from passengers for the Airport Use Fee (Tarifa de Uso de Aeropuertos or “TUA”) and other airport services. If the payment obligations are not met, the Company may immediately exercise the guarantees and utilize the funds. The aforementioned escrow deposits are recorded at cost.
Borrowing costs	g. Borrowing costs Borrowing costs directly attributable to the acquisition, construction or production of qualifying assets, which are assets that necessarily take a substantial period of time to get ready for their intended use or sale, are added to the cost of those assets, until such time as the assets are substantially ready for their intended use or sale. Investment income earned on the temporary investment of specific borrowings pending their expenditure on qualifying assets is deducted from the borrowing costs eligible for capitalization. All other borrowing costs are recognized in profit or loss in the period in which they are incurred.
Investment in airport concessions	h. Investment in airport concessions This item consists of the rights paid to manage, operate and, in certain cases make capital investments to 13 airports based on a concession granted by the Mexican Government through the Ministry of Communications and Transportation, and to use their facilities, for a 50-year term. Investment in concessions includes the rights to use airport facilities of airport concessions and improvements to concessioned assets and represents the amount granted by the Ministry of Communications and Transportation to each airport concessions, plus improvements made to each individual concession since the time of grant. Under all concession arrangements, (i) the grantor controls or regulates what services the Company must provide with the infrastructure, to whom it must provide them, and at what price; and (ii) the grantor controls, through ownership, any significant residual interest in the infrastructure at the end of the term of the arrangement. Accordingly, the Company classifies the assets derived from the construction, administration and operation of the service concession arrangements either as intangible assets, financial assets (accounts receivable) or a combination of both. The Company classifies its concessioned assets as an intangible asset, including its improvements. An intangible asset results when the operator constructs or makes improvements and is allowed to operate the infrastructure for a fixed period after construction is complete, in which the future cash flows of the operator have not been specified, because they may vary depending on the use of the asset, and are therefore considered contingent. The cost of financing incurred during the construction period is capitalized. Investments in airport concessions are amortized on a straight-line basis over the term of the concession, which is 50 years, or from the date of capitalization of additions or improvements considering the remaining term of the concession. Revenues and costs related to construction or improvements to intangible assets subject to the Company’s airport concession with the government are recognized as revenue based on the percentage of completion method associated with the related construction costs.
Impairment of tangible and intangible assets	i. Impairment of tangible and intangible assets Management periodically evaluates the impairment of long-lived assets in order to determine whether there is evidence that those assets have suffered an impairment loss. If impairment indicators exist, the recoverable amount of assets is determined, with the help of independent experts, to determine the extent of the impairment loss, if any. Intangible assets with indefinite useful life and intangible assets not yet available for use are tested for impairment at least annually, and whenever there is an indication that the asset may be impaired. Recoverable amount is the higher of fair value less costs to sell and value-in-use. In assessing value-in-use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset for which the estimates of future cash flows have not been adjusted. If the recoverable amount of an asset (or cash-generating unit) is estimated to be less than its carrying amount, the carrying amount of the asset (or cash-generating unit) is reduced to its recoverable amount. An impairment loss is recognized immediately in profit or loss. When an impairment subsequently reverses, the Company reverses a portion or all of the impairment losses recognized in prior periods. When an impairment loss is reversed, the carrying amount of the asset is increased to the revised estimated value of its recoverable amount, only to the extent that the increased carrying amount does not exceed the carrying amount that would have been calculated if no impairment loss had been initially recognized for the asset in prior years. A reversal of an impairment loss is recognized immediately in profit or loss. The Company considers that each airport individually cannot be considered as a “cash generating unit” to determine the extent of the loss impairment, since the tender for the concession was made by the Mexican Government as a package of 13 airports. Therefore, licensees are obligated to operate them regardless of the results generated individually. Considering the above, the evaluation of a possible impairment loss is performed taking into account the net assets of the 13 airports taken as a whole, while the hotels and industrial park are evaluated individually.
Financial instruments	j. Financial instruments Financial assets and financial liabilities are recognized when the Company becomes a party to the contractual provisions of the instruments. Financial assets and financial liabilities are initially measured at fair value. Transaction costs that are directly attributable to the acquisition or issue of financial assets and financial liabilities (other than financial assets and financial liabilities at fair value through profit or loss) are added to or deducted from the fair value of the financial assets or financial liabilities, as appropriate, on initial recognition. Transaction costs directly attributable to the acquisition of financial assets or financial liabilities at fair value through profit or loss are recognized immediately in profit or loss. Financial assets are classified into four categories, which in turn determine the form of recognition and valuation of financial assets and liabilities: “Financial assets at fair value through profit or loss”, “investments held-to-maturity”, “financial assets available-for-sale” and “loans and receivables”. The classification depends on the nature and purpose of the financial assets and is determined by the Company’s management upon initial recognition. The Company generally only has financial assets at fair value through profit or loss and loans and receivables and other investments held to maturity. In the consolidated statement of financial position, financial assets are classified into current and noncurrent, depending on whether their maturity is less than/equal to or greater than 12 months. Financial assets at fair value through profit or loss Financial assets are classified at fair value through profit or loss when the financial asset is held for trading or it is designated as fair value through profit or loss. A financial asset is classified as held for trading if: · It has been acquired principally for the purpose of selling it in the near term; or · On initial recognition, it is part of a portfolio of identified financial instruments that the Company manages together and has a recent actual pattern of short-term profit-taking; or · It is a derivative (except those designated as hedging instruments or that is a financial guarantee). Financial assets at fair value through profit of loss are recorded at fair value, recognizing in results any gain or loss arising from their remeasurement. The gain or loss recognized in results includes any dividend or interest earned from the financial asset and is recorded in interest expense or income in the consolidated statements of income and other comprehensive income. Loans and accounts receivables Loans and receivables are non-derivative financial assets that have fixed or determinable payments that are not quoted in an active market. After initial recognition, loans and receivables are measured at amortized cost using the effective interest method. Amortized cost means the initial amount recognized for a financial asset or liability plus or minus the cumulative amortization using the effective interest method of any difference between the initial amount and the amount at maturity, less any reduction (directly or through a reserve) for impairment or bad debt. Other held-to-maturity investments Held-to-maturity investments are non-derivative financial assets, with fixed or determinable payments and fixed maturity dates that the Company intends and is able to retain until maturity, which is after three months from the date of acquisition. Subsequent to initial recognition, held-to-maturity investments are valued at amortized cost using the effective interest method less any impairment loss. Impairment of financial assets Financial assets other than financial assets at fair value through profit or loss are assessed for indicators of impairment at the end of each reporting period. Financial assets are considered to be impaired when there is objective evidence that, as a result of one or more events that occurred after the initial recognition of the financial asset, the estimated future cash flows of the investment have been affected. For other financial assets, objective evidence of impairment could include: · Significant financial difficulty of the issuer or counterparty; or · Breach of contract, such as a default or delinquency in interest or principal payments; or · It becoming probable that the borrower will enter into bankruptcy or financial reorganization; or · The disappearance of an active market for that financial asset because of financial difficulties. The carrying amount of the financial asset is reduced directly by the impairment loss, except for trade receivables, where the carrying amount is reduced through the use of an allowance account. When a trade receivable is considered uncollectible, it is written off against the allowance account. Subsequent recoveries of amounts previously written off are recorded in results. Changes in the carrying amount of the allowance account are recognized in profit or loss. If, in a subsequent period, the amount of the impairment loss decreases and the decrease can be related objectively to an event occurring after the impairment was recognized, the previously recognized impairment loss is reversed through results to the extent that the carrying amount of the investment at the date the impairment is reversed does not exceed the amortized cost if would not have recognized the impairment. Derecognition of financial assets On derecognition of a financial asset in its entirety, the difference between the asset´s carrying amount and the sum of the consideration received and receivable and the cumulative gain or loss that had been recognized in other comprehensive income and accumulated in equity is recognized in results. Financial liabilities Financial liabilities are classified as financial liabilities at fair value through profit or loss, or other financial liabilities based on the substance of contractual arrangements. Financial liabilities at fair value through profit or loss Financial liabilities are classified at fair value through profit or loss when the financial liability is (i) for the contingent consideration that would be paid by the acquirer as part of a business combination covered by IFRS 3 ( Business Combinations ), (ii) held for trading or (iii) designated at fair value through profit or loss. A financial liability is classified as held for trading if: · It has been acquired principally for the purpose of repurchasing it in the near term; or · On initial recognition it is part of a portfolio of identified financial instruments that are managed together for which there is evidence of a recent pattern of making short-term profits, or · It is a derivative that accounting purposes does not comply with requirements to be designated as a hedging instrument. A financial liability other than a financial liability held for trading or a contingent transaction to be paid by owner as part of a business combination, may be designated as at fair value through profit or loss upon initial recognition if: · Such designation eliminates or significantly reduces a measurement or recognition inconsistency that would otherwise arise; or · The financial liability forms part of a group of financial assets or financial liabilities or both, which is managed and its performance is evaluated on a fair value basis, in accordance with the Company’s documented risk management or investment strategy, and information about the grouping is provided internally on that basis; or · It forms part of a contract containing one or more embedded derivatives, and IAS 39 permits the entire combined contract (asset or liability) to be designated as at fair value through profit or loss. Financial liabilities at fair value through profit or loss are stated at fair value, with any gains or losses arising on remeasurement recognized in profit or loss. The net gain or loss recognized in results incorporates any interest paid on the financial liability and is included in the interest expense in the consolidated statement of income and other comprehensive income. Other financial liabilities Other financial liabilities, including loans, bond issuances and debt with lenders and trade creditors and other payables are valued initially at fair value, represented generally by the consideration transferred, net of transaction costs, and are subsequently measured at amortized cost using the effective interest method. Derecognition of financial liabilities The Company derecognizes financial liabilities when, and only when, the obligations are discharged, cancelled or they expire. The difference between the carrying amount of the financial liability derecognized and the consideration paid and payable is recognized in results. Effective interest method The effective interest method is a method of calculating the amortized cost of a financial asset or liability and of allocating interest income or cost over the relevant period. The effective interest rate is the rate that exactly discounts future cash receivable or payable (including all fees and points paid or received that form an integral part of the effective interest rate, transaction costs and other premiums or discounts) through the expected life of the financial instrument, or (where appropriate) a shorter period, to the carrying amount of the financial asset or liability on its initial recognition. When calculating the effective interest rate, all cash flows must be estimated (for example, prepayment, and the like) except for future credit losses. The calculation must include all commissions and payments or receipts between the parties to the financial instrument, including other premiums or discounts. Offsetting of financial assets and liabilities Offsetting of financial assets and liabilities in the consolidated statement of financial position only occurs for accounts receivable and payable arising in transactions that contractually, or by law, have established a right of setoff and for which the Company has the intention to pay a net amount or to realize the asset and pay the liability simultaneously.
Risk management policy	k. Risk management policy The Company is exposed to risks that are managed through the implementation of systems and processes related to identification, measurement, limitation of concentration, and supervision. The basic principles defined by the Company in the establishment of its risk management policy are the following: · Compliance with Corporate Governance Standards. · Establishment, by each different business line and subsidiary, of risk management controls necessary to ensure that market transactions are conducted in accordance with the policies, rules and procedures of the Company. · Special attention to financial risk management, basically composed by interest rate, exchange rate, liquidity and credit risks (see note 21). Risk management in the Company is mainly preventive and oriented to medium- and long-term, risks taking into consideration the most probable scenarios of the variables affecting each risk.
Provisions	l. Provisions Provisions are recognized when the Company has a present obligation (legal or constructive) as a result of a past event, when it is probable that the Company will be required to settle the obligation, and when a reliable estimate can be made of the amount of the obligation. The amount recognized as a provision is the best estimate of the consideration required to settle the present obligation at the end of the reporting period, taking into account the risks and uncertainties associated with the obligation. When a provision is measured using the cash flows estimated to settle the present obligation, its carrying amount is the present value of those cash flows. The main provision recognized by the Company is for major maintenance for its concessioned assets, which is classified as current or noncurrent based on the estimated time period over which it expects to settle the obligation. Major maintenance provisions The Company is required to perform major maintenance activities to its airports as established by the concession provided by the Mexican Government, in order to preserve the infrastructure in optimal working condition. The estimated major maintenance costs are considered in the Company’s master development program, which is reviewed and updated every five years. The Company recognizes and measures the contractual obligations of major maintenance of infrastructure when accrued according to IAS 37 ( Provisions, Contingent Liabilities and Contingent Assets ) and IFRS Interpretation Committee 12 ( Service Concession Arrangements ), a portion is recorded as short-term and the remainder as long-term depending on the period in which the maintenance is expected to be performed. These contractual obligations to maintain and restore the infrastructure of airports are recognized as a provision in the consolidated statements of financial position and in the expenses of the current fiscal year, pursuant to estimates that are required to comply with the present obligation at the end of the reporting period. When the effect of the time value of money is material, the amount of the provision equals the present value of the expenditures expected to be required to settle the obligation. The carrying amount of the provision increases each period to reflect the passage of time and this increase is recognized as an expense. After initial recognition, provisions are reviewed at the end of each reporting period and adjusted to reflect current best estimates. Adjustments to provisions arise from three sources: (i) revisions to estimated cash flows (both in amount and timing); (ii) changes to present value due to the passage of time; and (iii) revisions of discount rates to reflect prevailing current market conditions. In periods following the initial recognition and measurement of the maintenance provision at its present value, the provision is revised to reflect estimated cash flows being closer to the measurement date. The unwinding of the discount relating to the passage of time is recognized as a financing cost and the revision of estimates of the amount and timing of cash flows is a remeasurement of the provision and charged or credited as an operating item within the consolidated statements of income and other comprehensive income.
Reserve for repurchase of shares	m. Reserve for repurchase of shares The Company records a reserve for the repurchase of shares from amounts appropriated from retained earnings, to strengthen the supply and demand of its shares in the stock market, as permitted by Mexican Securities Law. The shareholders’ meeting authorizes the maximum disbursement for the repurchase of shares to be used for this activity in each period between said meeting and the following, in which the application of results is approved and made. At the time of a purchase, shares are converted into treasury shares and become part of the shareholders’ equity at the purchase price; one part of the capital stock to the historical value, and the remainder to the reserve to repurchase shares.
Income taxes	n. Income taxes Income tax expense represents the sum of the tax currently payable and deferred tax. Current tax is determined based on taxable profit, which differs from profit as reported in the consolidated statement of income and other comprehensive income because of items of income or expense that are taxable or deductible in periods different from when they are recognized in accounting profit. Deferred income taxes are recognized for the applicable temporary differences resulting from comparing the accounting and tax values of assets and liabilities plus any future benefits from tax loss carry-forwards. Except as mentioned in the following paragraph, deferred tax liabilities are recognized for all taxable temporary differences and deferred tax assets are recognized for all deductible temporary differences and the expected benefit of tax losses. The carrying amount of deferred tax assets is reviewed at the end of each reporting period and reduced to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered. Deferred tax liabilities are recognized for taxable temporary differences associated with investments in subsidiaries, except where the Company is able to control the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future. Deferred tax assets arising from deductible temporary differences associated with such investments and interests are only recognized to the extent that it is probable that there will be sufficient taxable profits against which to utilize the benefits of the temporary differences and they are expected to reverse in the foreseeable future. Deferred tax assets and liabilities are measured at the tax rates that are expected to apply in the period in which the liability is settled or the asset realized, based on tax rates (and tax laws) that have been enacted or substantively enacted by the end of the reporting period. The measurement of deferred tax liabilities and assets reflects the tax consequences that would follow from the manner in which the Company expects, at the end of the reporting period, to recover or settle the carrying amount of its assets and liabilities. The Company determined recoverability of its deferred tax assets for each subsidiary based on its projections of future taxable income, which include the master development program and the maximum rates for the period 2016-2020 approved by the Ministry of Communications and Transportation. Current and deferred income taxes are recognized as income or expense in profit or net loss, except when they relate to items recognized outside of profit or loss, as in the case of items of other comprehensive income, or other shareholders’ equity items, in which case the tax is recognized in other comprehensive income as part of the equity item involved. Assets and deferred tax liabilities are offset when a legal right to offset assets with liabilities exists and when they relate to income taxes relating to the same tax authorities and the Company intends to liquidate its assets and liabilities on a net basis.
Employee benefits	o. Employee benefits Short-term employee benefits A liability is recognized for benefits accruing to employees in respect of wages and salaries, annual leave and sick leave in the period the related service is rendered at the undiscounted amount of the benefits expected to be paid in exchange for that service. Certain subsidiaries are subject to payment of statutory employee profit sharing, which is determined based on the Income Tax Law, and is recorded in the results of the year in which it is incurred and presented under cost and administrative expenses in the consolidated statements of income and other comprehensive income. Liabilities recognized in respect of short-term employee benefits are measured at the undiscounted amount of the benefits expected to be paid in exchange for the related services. Benefits from retirement and termination Payments to defined contribution retirement benefit plans are recognized as an expense when employees have rendered service entitling them to the contributions. For defined benefit retirement benefit plans, the cost of providing benefits is determined using the projected unit credit method, with actuarial valuations being carried out at the end of each annual reporting period. Remeasurement, comprising actuarial gains and losses, the effect of the changes to the asset ceiling (if applicable) and the return on plan assets (excluding interest), is reflected immediately in the consolidated financial statements with a charge or credit recognized in other comprehensive income in the period in which they occur. Remeasurement recognized in other comprehensive income may be reclassified directly to retained earnings but will not be reclassified to profit or loss. Past service cost is recognized in profit or loss in the period of a plan amendment. Net interest is calculated by applying the discount rate at the beginning of the period to the net defined benefit liability or asset. Defined benefit costs are categorized as follows: a. Service cost (including current service cost, past service cost, as well as gains and losses on curtailments and settlements) b. Net interest expense or income c. Remeasurement The Company presents the first two components of defined benefit costs in the consolidated statements of income and other comprehensive income in the line items cost of services and administrative expenses. Curtailment gains and losses are accounted for as past service costs. The retirement benefit obligation recognized in the consolidated statement of financial position represents the actual deficit or surplus in the Company’s defined benefit plans. Any surplus resulting from this calculation is limited to the present value of any economic benefits available in the form of refunds from the plans or reductions in future contributions to the plans. A liability for a termination benefits is recognized at the earlier of when the Company can no longer withdraw the offer of the termination benefit and when the Company recognizes any related restructuring costs.
Revenue recognition	p. Revenue recognition Revenues are recognized when it is likely that the Company will receive the economic benefits associated with the transaction. Revenue is measured at the fair value of the consideration received or receivable and represents the amounts receivable for goods and services provided in the normal course of activities. Revenue is reduced for discounts and incentives provided to customers as well as other similar allowances. Revenues are mainly generated from the delivery of aeronautical and non-aeronautical services. Aeronautical services Consist mainly of revenues generated from activities related to services provided to airlines and passengers. These revenues are subject to a system of prices regulated by the Ministry of Communications and Transportation, which establishes a maximum rate for such aeronautical and complementary services provided at each airport. Such revenues are recognized when the related services are rendered. With the objective of increasing demand for aeronautical traffic at its airports, the Company implemented an incentive program to its airline customers linked to an increase in airline traffic and the opening of new routes, which is subject to certain restrictions. These incentives are recorded as a reduction of revenues over the period they are provided to clients (see note 27). Non-aeronautical services Consist mainly of the leasing of commercial spaces in airport terminals (different from spaces occupied by airlines that are essential for their operation), revenues from the operation of parking lots, advertising, fees from access to third parties that provide catering services and other services at airports. Spaces in the airport terminals are rented through operating lease agreements that contain either fixed monthly rent (increased annually based on the National Consumer Price Index (“NCPI”)) or fees based on a minimum monthly fee or a percentage of the monthly income of the lessee, whichever is higher (contingent rent). The fixed portion of lease revenues is recognized when the services are rendered or based on the terms of the related lease. Contingent rentals received from the percentage of monthly sales from the Company’s leases are recognized in income once the contingency is met. Therefore, during the year, the percentage of lessee monthly revenues is recognized in the following month, once the Company has received information related to its tenants’ revenues. Though each year reported includes twelve months of revenues, this accounting treatment results in a one-month lag with respect to the commercial revenues for those tenants whose stated percentage of monthly income is greater than the minimum monthly fee. However, the Company monitors the effect of this one-month lag at each reporting date and does not believe such effect to be material to its reported results. Leasing revenues The Company’s policy for recognition of revenue from operating leases is described in subparagraph e) of this note (the Company as lessor). Hotel services revenues Revenues are recognized when the services are rendered. Construction services and costs of improvements to concessioned assets Under IFRIC 12 ( Service Concession Arrangements ), the Company recognizes revenues and costs for improvements to the airport concession according to the percentage of completion method derived from the improvements made to the airports and that are included in the master development program. Construction service revenues related to the airport concession are determined based on the exchange between the Company and the government, as the Company constructs or improves the airports based on the master development program, and the government grants the Company the right to obtain revenues from the airport services rendered in return for those construction services. The cost for construction services is determined according to the cost the Company would incur in the construction or improvements based on the investments included in the master development program, for which, through a tender offer, the Company contracts third parties to perform. The revenue amount and cost are equivalent, because the Company does not obtain any profit margin for the construction, and the costs incurred are paid at market prices.
Basic and diluted earnings per share	q. Basic and diluted earnings per share Basic earnings per share are computed by dividing net income of the controlling interest by the weighted average number of common shares outstanding during the year. The Company does not have potentially dilutive shares.

Significant accounting polici34

Significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2017
Significant accounting policies
Summary of useful lives of assets	Useful Life (years) Improvement in leased assets 20 Machinery and equipment 10 Furniture and office equipment 10 Transportation equipment 4 Computer equipment 3.3

Cash and cash equivalents (Tabl

Cash and cash equivalents (Tables)	12 Months Ended
	Dec. 31, 2017
Cash and cash equivalents.
Cash and cash equivalent	December 31, 2017 2016 2015 Cash Ps. 602,074 Ps. 1,052,860 Ps. 86,388 Cash equivalents: Bank notes 1,269,090 932,638 1,574,653 Commercial paper 139,870 124,361 349,297 Money market investment funds 321,973 895,933 594,858 Ps. 2,333,007 Ps. 3,005,792 Ps. 2,605,196

Accounts receivable (Tables)

Accounts receivable (Tables)	12 Months Ended
	Dec. 31, 2017
Accounts receivable
Schedule of accounts receivable	December 31, 2017 2016 2015 Receivables Ps. 668,980 Ps. 781,612 Ps. 458,518 Allowance for doubtful accounts (note 7 b.) (38,223) (67,482) (67,733) Ps. 630,757 Ps. 714,130 Ps. 390,785
Schedule of percentage of principal customers among total accounts receivable	December 31, 2017 2016 2015 % % % Accounts receivable: Aeroenlaces Nacionales, S. A. de C. V. 20.40 19.25 16.99 Concesionaria Vuela Compañía de Aviacion, S.A.P.I. de C.V. 18.14 18.42 4.80 ABC Aerolíneas, S. A. de C. V. 1.08 8.41 5.90 Aerolitoral, S. A. de C. V. 24.21 17.68 21.04 Compañía Mexicana de Aviación, S. A. de C. V., Aerovias Caribe, S. A. de C. V. y Mexicana Inter, S. A. de C. V. (1) - 0.60 2.97 Aerovías de México, S. A. de C.V. 6.01 6.27 8.20 (1) As of December 31, 2017, the balances of these customers were applied against the allowance for doubtful accounts. The balances owed from these clients were canceled against the allowance for doubtful accounts. As of December 31, 2016 and 2015, the balances owed from this client were fully reserved, in amounts of Ps. 13,611 in both years.
Schedule of percentage of revenue from principal customers	Year ended December 31, 2017 2016 2015 % % % Revenues by client: Aerolitoral, S. A. de C. V. 14.17 14.33 15.59 Aeroenlaces Nacionales, S. A. de C. V. 15.19 13.72 12.54 ABC Aerolíneas, S. A. de C. V. 11.06 11.93 13.45 Concesionaria Vuela Compañía de Aviación, S. A. P. I. de C. V. 12.74 13.43 9.35 Aerovías de México, S. A. de C. V. 4.85 5.08 5.98
Schedule of changes in allowance for doubtful accounts	December 31, 2017 2016 2015 Beginning balance Ps. 67,482 Ps. 67,733 Ps. 184,579 (Decrease) increase (10,561) 749 (1,103) Write-off (18,698) (1,000) (115,743) Ending balance Ps. 38,223 Ps. 67,482 Ps. 67,733
Schedule of aging of accounts receivable	December 31, 2017 2016 2015 Due: 1-120 days Ps. 41,294 Ps. 104,318 Ps. 39,969 121- 360 days 14,448 34,821 14,301 Total Ps. 55,742 Ps. 139,139 Ps. 54,270

Other accounts receivable and37

Other accounts receivable and prepaid expenses (Tables)	12 Months Ended
	Dec. 31, 2017
Other accounts receivable and prepaid expenses.
Schedule of other accounts receivable and prepaid expenses	December 31, 2017 2016 2015 Prepaid expenses Ps. 23,310 Ps. 14,316 Ps. 18,529 Guarantee deposits 5,800 5,844 6,512 Others 9,746 8,745 4,983 Ps. 38,856 Ps. 28,905 Ps. 30,024

Property, leasehold improveme38

Property, leasehold improvements and equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [abstract]
Schedule of property, leasehold improvements and equipment	December 31, 2017 2016 2015 Net carrying value: Land (note 10) Ps. 1,709,508 Ps. 1,707,236 Ps. 1,715,636 Leasehold improvements 660,589 456,505 424,511 Machinery and equipment 116,117 130,349 146,626 Furniture and office equipment 47,113 50,835 61,200 Transportation equipment 36,246 9,042 8,548 Computer equipment 9,483 12,020 14,454 Construction in progress for leasehold improvements 22,341 78,218 — Ps. 2,601,397 Ps. 2,444,205 Ps. 2,370,975 Construction Machinery Furniture in progress of Leasehold and and office Transportation Computer leasehold Cost Land improvements equipment equipment equipment equipment improvements Total Balance as of January 1, 2015 Ps. 1,715,636 Ps. 338,393 Ps. 179,697 Ps. 133,757 Ps. 28,043 Ps. 50,481 Ps. 78,671 Ps. 2,524,678 Acquisitions — — 14,941 11,407 2,102 10,878 109,329 148,657 Disposals — — — — (1,024) — — (1,024) Transfers — 188,000 — — — — (188,000) — Other — — — (181) — (1,172) — (1,353) Balance as of December 31, 2015 1,715,636 526,393 194,638 144,983 29,121 60,187 — 2,670,958 Acquisitions — 12,963 2,223 2,787 6,227 4,040 124,878 153,118 Disposals (8,400) — — (625) (3,030) (31) — (12,086) Transfers — 46,660 — — — — (46,660) — Other — — — — — — — — Balance as of December 31, 2016 1,707,236 586,016 196,861 147,145 32,318 64,196 78,218 2,811,990 Acquisitions 235,091 Disposals — — (249) — (4,532) (62) — (4,843) Transfers — 131,730 — — — — (131,730) — Other — — — (183) (1,274) (242) — (1,699) Balance as of December 31, 2017 Ps. 1,709,508 Ps. 825,481 Ps. 201,114 Ps. 153,355 Ps. 61,043 Ps. 67,697 Ps. 22,341 Ps. 3,040,539 Construction in Furniture and progress of Accumulated Leasehold Machinery and office Transportation Computer leasehold depreciation improvements equipment equipment equipment equipment improvements Total Balance as of January 1, 2015 Ps. (83,154) Ps. (29,980) Ps. (71,194) Ps. (15,554) Ps. (40,482) Ps. — Ps. (240,364) Disposals — — — 890 — — 890 Depreciation (18,728) (18,032) (12,768) (5,909) (6,428) — (61,865) Other — — 179 — 1,177 — 1,356 Balance as of December 31, 2015 (101,882) (48,012) (83,783) (20,573) (45,733) — (299,983) Disposals — — — 3,007 31 3,038 Depreciation (27,629) (18,500) (12,527) (5,710) (6,474) — (70,840) Other — — — — — — — Balance as of December 31, 2016 (129,511) (66,512) (96,310) (23,276) (52,176) — (367,785) Disposals — — — 4,532 47 — 4,579 Depreciation (35,342) (18,674) (10,112) (7,264) (6,323) — (77,715) Other (39) 189 180 1,211 238 — 1,779 Balance as of December 31, 2017 Ps. (164,892) Ps. (84,997) Ps. (106,242) Ps. (24,797) Ps. (58,214) Ps. — Ps. (439,142)

Investment in airport concess39

Investment in airport concessions (Tables)	12 Months Ended
	Dec. 31, 2017
Investment in airport concessions
Schedule of carrying value and changes in concessioned assets	The Company has concessions to operate, maintain and develop 13 airports in Mexico, which are concentrated in central and northern regions of the country. Each concession is for 50 years from November 1, 1998. The term of each of the Company’s concessions may be extended by the Ministry of Communications and Transportation under certain circumstances for a period not exceeding 50 years. As operators of 13 airports the Company earns revenue from airlines, passengers, and other users for using the airport facilities. The Company also earns revenues for commercial activities carried out at the airports, such as leasing of space to restaurants and other shops. Each airport concession agreement contains the following terms and basic conditions: a. The concessionaire has the right to manage, operate, maintain and use the airport facilities and carry out any construction, improvements or maintenance of the related facilities in accordance with its five-year period master development program, and to provide airport, complementary and commercial services. b. The concessionaire will use the airport facilities only for the purposes specified in the concession agreement, will provide services in conformity with the law and applicable regulations and will be subject to inspections by the Ministry of Communications and Transportation. c. The concessionaire must pay a concession tax for the right to use airport facilities (currently 5% of the concessionaire’s annual gross revenues derived from the use of public property), in conformity with the Mexican Federal Duties Law. d. The Mexican Airport and Auxiliary Services agency (Aeropuertos y Servicios Auxiliares) has the exclusive right to supply fuel at the concessionaire’s airports. e. The concessionaire must grant free access to specific airport areas to certain Mexican government agencies, so that they may carry out their activities within the airports. f. The concession may be revoked if the concessionaire breaches any of its obligations established in the concession title, as established in Article 26 and 27 of the General Airports Law and in the concession title. The breach of certain concession terms may be cause for revocation if the Ministry of Communications and Transportation has applied sanctions in three different instances with respect to the same concession term. The terms and conditions of each concession contract have been fulfilled in all important aspects during the years ended December 31, 2017, 2016 and 2015. Investments in airport concessions include: improvements to concessioned assets, rights to use airport facilities, and airport concessions. The total cost of the concession was assigned proportionally to rights to use airport facilities on the basis of the fair value of the assets determined by an independent appraiser. At any airport concession where the cost exceeded the fair value, the excess was recognized within the airport concessions line item. As of December 31, 2017, 2016 and 2015, the carrying value of the right to use airport facilities, airport concessions and improvement to concessioned assets classified as intangible assets are as follows: December 31, 2017 2016 2015 Projects completed and in operation: Airport concessions Ps. 605,643 Ps. 605,643 Ps. 605,643 Rights to use airport facilities 3,356,762 3,356,762 3,356,762 Improvements to concessioned assets (note 15) 5,859,174 4,532,716 4,187,944 Accumulated amortization (2,173,162) (1,981,607) (1,801,744) Ps. 7,648,417 Ps. 6,513,514 Ps. 6,348,605 The changes in investment in concessions are as follows: December 31, 2017 2016 2015 Investment in airport concessions Beginning balance Ps. 8,495,121 Ps. 8,150,349 Ps. 7,807,228 Increase 1,326,458 344,772 347,988 Disposals - — (4,867) Ending balance 9,821,579 8,495,121 8,150,349 Amortization of airport concessions: Beginning balance (1,981,607) (1,801,744) (1,626,951) Increase (191,555) (179,863) (175,106) Disposals — — 313 Ending balance (2,173,162) (1,981,607) (1,801,744) Net investment in airport concessions Ps. 7,648,417 Ps. 6,513,514 Ps. 6,348,605
Schedule of contractual obligations under development plan	Year Amount 2018 Ps. 2,377,074 2019 711,353 2020 466,396 Ps. 3,554,823

Composition of GACN (Tables)

Composition of GACN (Tables)	12 Months Ended
	Dec. 31, 2017
Composition of GACN
Schedule of information about the composition of GACN	Place of incorporation and Number of Principal activity operation subsidiaries Airports Mexico 13 Hotels Mexico 2 Services Mexico 9 24
Schedule of consolidated subsidiaries	Name of subsidiary Ownership Percentage Airport services Aeropuerto de Monterrey, S. A. de C. V. 100 % Aeropuerto de Acapulco, S. A. de C. V. 100 % Aeropuerto de Mazatlan, S. A. de C. V. 100 % Aeropuerto de Zihuatanejo, S. A. de C. V. 100 % Aeropuerto de Culiacan, S. A. de C. V. 100 % Aeropuerto de Ciudad Juarez, S. A. de C. V. 100 % Aeropuerto de Chihuahua, S. A. de C. V. 100 % Aeropuerto de Torreon, S. A. de C. V. 100 % Aeropuerto de Durango, S. A. de C. V. 100 % Aeropuerto de Tampico, S. A. de C. V. 100 % Aeropuerto de Reynosa, S. A. de C. V. 100 % Aeropuerto de Zacatecas, S. A. de C. V. 100 % Aeropuerto de San Luis Potosi, S. A. de C. V. 100 % Hotels and Services Operadora de Aeropuertos del Centro Norte, S. A. de C. V. 100 % Servicios Aeroportuarios del Centro Norte, S. A. de C. V. 100 % Servicios Aero Especializados del Centro Norte, S. A. de C. V. 100 % OMA Logistica, S. A. de C. V. (1) 100 % Holding Consorcio Grupo Hotelero T2, S. A. de C. V. (2) 100 % (1) Includes subsidiaries in which the Company holds an equity participation through OMA Logistica: OMA VYNMSA Aero Industrial Park, S.A. de C.V (VYNMSA) (51%), Consorcio Hotelero Aeropuerto de Monterrey, S.A.P.I de C.V (85%) and Servicios Hoteleros Aeropuerto de Monterrey, S.A. de C.V. (85%). (2) Provides hotel services and includes subsidiaries in which the Company holds an equity participation through Holding Consorcio Hotelero T2: Servicios Complementarios del Centro Norte, S.A. de C.V. (100%), Servicios Corporativos Terminal 2, S.A. de C.V. (100%), and Consorcio Grupo Hotelero T2, S.A. de C.V. (90%).

Trade accounts payable (Tables)

Trade accounts payable (Tables)	12 Months Ended
	Dec. 31, 2017
Trade accounts payable
Schedule of trade accounts payable	December 31, 2017 2016 2015 Suppliers and contractors Ps. 207,190 Ps. 212,939 Ps. 165,165 Customer advances 42,317 39,892 78,702 Statutory employee profit sharing 6,475 9,242 9,491 Ps. 255,982 Ps. 262,073 Ps. 253,358

Payable taxes and other accru42

Payable taxes and other accrued expenses (Tables)	12 Months Ended
	Dec. 31, 2017
Payable taxes and other accrued expenses
Schedule of tax payable and other accrued expenses	December 31, 2017 2016 2015 Accrued expenses Ps. 145,123 Ps. 183,175 Ps. 171,046 Taxes payable other than income tax 220,524 262,772 158,589 Accrued interest 69,125 43,254 42,425 Ps. 434,772 Ps. 489,201 Ps. 372,060

Major maintenance provision (Ta

Major maintenance provision (Tables)	12 Months Ended
	Dec. 31, 2017
Major maintenance provision.
Schedule of composition and changes of major maintenance provision	December 31, December 31, 2017 2016 Additions Disbursements Short-term Long-term Major maintenance of concessioned assets Ps. 669,653 Ps. 285,755 (1) Ps. (97,784) Ps. 232,645 Ps. 624,979 December 31, December 31, 2016 2015 Additions Disbursements Short-term Long-term Major maintenance of concessioned assets Ps. 603,703 Ps. 168,804 (1) Ps. (102,854) Ps. 160,607 Ps. 509,046 December 31, December 31, 2015 2014 Additions Disbursements Short-term Long-term Major maintenance of concessioned assets Ps. 592,789 Ps. 182,561 (1) Ps. (171,647) Ps. 220,410 Ps. 383,293 Includes Ps. (5,477), Ps. (94,072) and Ps. 8,268, recognized as interest (income) expense in the consolidated statement of income and other comprehensive income, for the accumulated effect of the present value estimation as of December 31, 2017, 2016 and 2015, respectively.

Labor obligations (Tables)

Labor obligations (Tables)	12 Months Ended
	Dec. 31, 2017
Labor obligations
Schedule of principal assumptions for actuarial valuations	Year ended December 31, 2017 2016 2015 Discount rate (note 5 a.) 7.75 % 7.75 % 7.25 % Expected rate of salary increase 4.50 % 4.50 % 4.50 % Average longevity at retirement age for current pensioners (years) 14 15 12 Inflation 3.50 % 3.50 % 3.50 %
Schedule of amounts recognized in the statement of income and other comprehensive income	Year ended December 31, 2017 2016 2015 Service cost: Current service cost Ps. 7,995 Ps. 7,629 Ps. 7,574 Net interest expense 7,672 6,664 5,627 Components of defined benefit costs recognized in profit or loss 15,667 14,293 13,201 Remeasurement on the net defined benefit liability: Actuarial gains and losses arising from changes in financial assumptions — (5,815) (4,554) Actuarial gains and losses arising from experience adjustments 4,199 2,282 5,840 Components of defined benefit costs recognized in other comprehensive income 4,199 (3,533) 1,286 Total Ps. 19,866 Ps. 10,760 Ps. 14,487
Schedule of the amount included in the consolidated statement of financial position arising from the Company’s obligation in respect of its defined benefit plans	December 31, 2017 2016 2015 Present value of defined benefit obligations Ps. 127,479 Ps. 111,921 Ps. 106,414
Schedule of movements in the present value of the defined benefit obligation	December 31, 2017 2016 2015 Present value of defined benefit obligation as of January 1, Ps. 111,921 Ps. 106,414 Ps. 94,313 Current service cost 7,995 7,629 7,574 Interest cost 7,672 6,664 5,627 Remeasurement (gains)/losses: Actuarial gains and losses arising from changes in financial and demographic assumptions - (5,815) (4,554) Actuarial gains and losses arising from experience adjustments 4,199 2,282 5,840 Benefits paid (4,308) (5,253) (2,386) Present value of defined benefit obligation Ps. 127,479 Ps. 111,921 Ps. 106,414
Schedule of expected cash flows from pension plans and seniority premium benefits	Seniority premium Year Pensions plan benefits Total 2018 Ps. 28,776 Ps. 1,638 Ps. 30,414 2019 6,435 1,469 7,904 2020 8,397 1,505 9,902 2021 5,370 1,489 6,859 2022 5,361 1,520 6,881 From 2023 to 2028 44,122 8,563 52,685 Total Ps. 98,461 Ps. 16,184 Ps. 114,645

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2017
Leases
Schedule of payments recognized as cost and expense	Year ended December 31, 2017 2016 2015 Costs and leasing expenses Ps. 53,070 Ps. 47,649 Ps. 44,779
Schedule of operating lease commitments as lessee	Year ended December 31, 2017 2016 2015 Duration: Less than one year Ps. 37,053 Ps. 27,950 Ps. 32,913 Greater than 1 year and less than 5 years 139,359 104,984 106,739 Greater than 5 years 192,846 192,471 218,719 Total Ps. 369,258 Ps. 325,405 Ps. 358,371
Schedule of operating lease commitments as lessor	Year ended December 31, 2017 2016 2015 Duration: Less than 1 year Ps. 287,650 Ps. 402,871 Ps. 352,644 Greater than 1 year and less than 5 years 542,063 741,320 521,026 Greater than 5 years 117,911 321,870 93,110 Total Ps. 947,624 Ps. 1,466,061 Ps. 966,780
Schedule of financial lease (as lessee)	December 31, 2017 Total long-term financial lease (1) Ps. 37,450 Current portion (6,592) Long-term financial lease Ps. 30,858

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income taxes
Schedule of current and deferred tax expense	Income tax are as follows: Year ended December 31, 2017 2016 2015 Current ISR Ps. 810,641 Ps. 672,298 Ps. 453,066 Deferred ISR 2,432 74,484 59,044 Income tax expense Ps. 813,073 Ps. 746,782 Ps. 512,110
Schedule comprising the balance of the deferred ISR asset and (liability)	December 31, 2017 2016 2015 Liabilities: Provisions, allowances and labor obligations Ps. 116,740 Ps. 99,313 Ps. 69,288 Investment in airport concessions, property, leasehold improvements and equipment, net (362,866) (419,384) (386,888) Tax loss carryforwards (1) 9,955 53,004 42,919 Recoverable tax on assets 39,090 48,276 73,633 Total liabilities Ps. (197,081) Ps. (218,791) Ps. (201,048) Assets: Provisions, allowances and labor obligations Ps. 217,987 Ps. 190,164 Ps. 189,002 Investments in airport concessions, property, leasehold improvements and equipment, net (281,119) (303,839) (360,211) Tax loss carryforwards (1) 411,166 493,778 634,469 Total assets Ps. 348,034 Ps. 380,103 Ps. 463,260 Net deferred ISR asset Ps. 150,953 Ps. 161,312 Ps. 262,212 (1) As of December 31, 2017, 2016 and 2015, the Company recognized a deferred tax asset of Ps.421,121, Ps.546,782 and Ps.677,388, respectively, corresponding to the tax losses generated by its subsidiaries. All subsidiaries of the Company expect to benefit from losses in future years based on projections of taxable income and various strategies with favorable tax consequences. For the years ended December 31, 2017 and 2016, the Company did not make changes in the deferred asset estimates for amortizable tax losses.
Schedule of changes in deferred tax	The changes in deferred tax during the year are as follows: December 31, 2017 2016 2015 Beginning balance of deferred tax liability, net Ps. 161,312 Ps. 262,212 Ps. 314,430 Deferred ISR in results (2,432) (74,484) (59,044) Recoverable tax on assets (9,186) (25,356) 6,440 Income tax effects recognized in other comprehensive income 1,259 (1,060) 386 Ending balance of deferred tax asset, net Ps. 150,953 Ps. 161,312 Ps. 262,212
Reconciliation of statutory income tax rate and the effective income tax rate as a percentage of net income before income tax	The reconciliation of the statutory income tax rate and the effective income tax rate as a percentage of net income before income tax is as follows: Year ended December 31, 2017 2016 2015 Amount Rate % Amount Rate % Amount Rate % Income before income taxes Ps. 2,950,515 Ps. 2,623,283 Ps. 1,748,747 Current ISR 810,641 672,298 453,066 Deferred ISR 2,432 74,484 59,044 Effective rate Ps. 813,073 27.56 % Ps. 746,782 28.47 % Ps. 512,110 29.28 % Add (deduct) effects of permanent differences, primarily, non-deductible expenses and inflationary effects for financial and tax purposes. 71,107 2.41 % 37,513 1.43 % 19,236 1.10 % Other 975 0.03 % 2,690 0.10 % (6,722) (0.38) % Statutory rate Ps. 885,155 30.00 % Ps. 786,985 30.00 % Ps. 524,624 30.00 %
Schedule of tax losses carried forward	Each airport concession has received approval from the Ministry of Finance and Public Credit ( Secretaría de Hacienda y Crédito Público ) to carry forward their tax losses up to the earlier of the date of which such tax loss carryforwards are utilized by the airport or the date of expiration or liquidation of the concession. The base years and amounts as of December 31, 2017 are as follows: Tax loss Year of Origin carryforwards 2001 Ps. 5,745 2002 190,164 2003 346,924 2004 423,841 2005 60,981 2006 64,235 2007 86,884 2008 42,405 2009 5,072 2011 31,988 2012 65,230 2013 40,508 2015 30,112 Ps. 1,394,089
Schedule of the balances of shareholders’ equity tax accounts	December 31, 2017 2016 2015 Contributed capital account Ps. 3,940,312 Ps. 3,700,652 Ps. 3,580,472 Net consolidated tax profit account 1,331,694 1,018,588 1,515,123 Total Ps. 5,272,006 Ps. 4,719,240 Ps. 5,095,595

Financial risk management (Tabl

Financial risk management (Tables)	12 Months Ended
	Dec. 31, 2017
Financial risk management
Schedule of principal categories of financial instruments	December 31, Financial assets Risk classification 2017 2016 2015 Cash and cash equivalents and other investments held to maturity Credit and interest rate Ps. 2,382,345 Ps. 3,005,792 Ps. 2,665,641 Receivables, net Credit and exchange rate 630,757 714,130 390,785 December 31, Financial liabilities Risk classification 2017 2016 2015 Short-term and long-term debt Interest rate, exchange rate and liquidity Ps. 4,644,387 Ps. 4,707,303 Ps. 4,729,388 Trade accounts payable (1) Liquidity 249,507 252,831 243,867 Accrued interest Liquidity 69,125 43,254 42,425 Accounts payable to related parties Liquidity 130,022 140,328 67,521 (1) Does not include the payments of employee statutory profit-sharing amounts, which were Ps.6,475, Ps. 9,242 and Ps.9,491 as of December 31, 2017, 2016 and 2015, respectively.
Schedule of carrying values of monetary assets and liabilities denominated in foreign currencies	Liabilities Assets December 31, December 31, Currency 2017 2016 2015 2017 2016 2015 U.S. dollars U.S.$ (15,631) U.S.$ (14,457) U.S.$ (14,389) U.S.$ 41,001 U.S.$ 12,050 U.S.$ 169
Schedule of transactions in U.S. dollars	December 31, 2017 2016 2015 Technical assistance U.S.$ 6,863 U.S.$ 5,707 U.S.$ 5,641 Insurance 2,295 1,481 2,651 Purchase of machinery and maintenance 16,562 6,886 7,506 Software 1,722 1,728 1,095 Professional services, fees and subscriptions 968 1,161 607 Other 6,437 7,660 5,387
Schedule of pertinent exchange rate information	December 31, 2017 2016 2015 U.S. dollar exchange rate Interbank Ps. 19.7354 Ps. 20.664 Ps. 17.3398
Schedule of remaining contractual maturities of financial liabilities with agreed repayment periods	2025 and As of December 31, 2017 2018 2019-2021 2022-2024 subsequently Total Long-term debt Ps. 50,852 Ps. 3,093,535 Ps. 1,500,000 Ps. — Ps. 4,644,387 Interest (1) 310,710 806,984 118,078 — 1,235,772 Trade accounts payable 249,507 — — — 249,507 Accrued expenses 69,125 — — — 69,125 Accounts payable with related parties 130,022 — — — 130,022 Total Ps. 810,216 Ps. 3,900,519 Ps. 1,618,078 Ps. — Ps. 6,328,813 2024 and To December 31, 2016 2017 2018-2020 2021-2023 subsequently Total Long-term debt Ps. 56,122 Ps. 137,166 Ps. 3,014,015 Ps. 1,500,000 Ps. 4,707,303 Interest (1) 313,145 929,050 287,120 19,680 1,548,995 Trade accounts payable 252,831 — — — 252,831 Accrued expenses 43,254 — — — 43,254 Accounts payable with related parties 140,328 — — — 140,328 Total Ps. 805,680 Ps. 1,066,216 Ps. 3,301,135 Ps. 1,519,680 Ps. 6,692,711 2023 and As of December 31, 2015 2016 2017-2019 2020-2022 subsequently Total Long-term debt Ps. 55,433 Ps. 128,337 Ps. 3,045,618 Ps. 1,500,000 Ps. 4,729,388 Interest (1) 312,296 931,603 595,794 19,680 1,859,373 Trade accounts payable 243,867 — — — 243,867 Accrued expenses 42,425 — — — 42,425 Accounts payable with related parties 67,521 — — — 67,521 Total Ps. 721,542 Ps. 1,059,940 Ps. 3,641,412 Ps. 1,519,680 Ps. 6,942,574 (1) The projected interest is determined based on LIBOR and assuming an exchange rate of Ps.19.7354, Ps.20.664 and Ps.17.3398 (as of December 31, 2017, 2016 and 2015, respectively) per U.S. $1.00.
Schedule of fair value and carrying value of long term debt	December 31, 2017 December 31, 2016 December 31, 2015 Book value Fair value Book value Fair value Book value Fair value Ps. 4,644,387 Ps. 4,465,684 Ps. 4,707,303 Ps. 4,489,119 Ps. 4,729,388 Ps. 4,655,234 Hierarchy of fair value as of December 31, 2017 Level 1 Level 2 Level 3 Total Financial liabilities: Long-term debt (1) Ps. 4,246,875 Ps. 218,809 Ps. — Ps. 4,465,684 Hierarchy of fair value as of December 31, 2016 Level 1 Level 2 Level 3 Total Financial liabilities: Long-term debt (1) Ps. 4,204,695 Ps. 284,424 Ps. — Ps. 4,489,119 Hierarchy of fair value as of December 31, 2015 Level 1 Level 2 Level 3 Total Financial liabilities: Long-term debt (1) Ps. 4,384,607 Ps. 270,627 Ps. — Ps. 4,655,234 The fair values of the financial assets and financial liabilities included in the level 2 category above have been determined in accordance with generally accepted pricing models based on a discounted cash flow analysis, with the most significant inputs being the discount rate that reflects the credit risk of counterparties.

Shareholders' equity (Tables)

Shareholders' equity (Tables)	12 Months Ended
	Dec. 31, 2017
Shareholders' equity
Schedule of subscribed and paid-in capital stock	December 31, 2017 Number of Shares Contributed Capital Fixed capital: Series B Class I 344,004,973 Ps. 265,269 Series BB Class I 49,766,000 38,375 Treasury Series B Class I shares (324,507) (250) 393,446,466 Ps. 303,394 December 31, 2016 Number of Shares Contributed Capital Fixed capital: Series B Class I 350,234,000 Ps. 270,071 Series BB Class I 49,766,000 38,375 Treasury Series B Class I shares (6,229,027) (4,802) 393,770,973 Ps. 303,644

Accumulated other comprehensi49

Accumulated other comprehensive loss (Tables)	12 Months Ended
	Dec. 31, 2017
Accumulated other comprehensive loss
Schedule of accumulated other comprehensive income	Labor obligations Amount Deferred taxes Total Balance as of January 1, 2015 Ps. (13,727) Ps. 4,102 Ps. (9,625) Movements of the year (1,286) 386 (900) Balance as of December 31, 2015 (15,013) 4,488 (10,525) Movements of the year 3,533 (1,060) 2,473 Balance as of December 31, 2016 (11,480) 3,428 (8,052) Movements of the year (4,199) 1,260 (2,939) Balance as of December 31, 2017 Ps. (15,679) Ps. 4,688 Ps. (10,991)

Other income (Tables)

Other income (Tables)	12 Months Ended
	Dec. 31, 2017
Other income
Schedule of other income	Year ended December 31, 2017 2016 2015 Gain on sale of equipment Ps. (1,340) Ps. (22,250) Ps. (140) Insurance recovery (40) — (6,790) Ps. (1,380) Ps. (22,250) Ps. (6,930)

Related party balances and tr51

Related party balances and transactions (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of transactions between related parties [abstract]
Schedule of repayments for construction to related parties	December 31, 2017 2016 2015 ICA Constructora de Infraestructura, S.A. de C.V. (2) Ps. 44,254 Ps. — Ps. — ICA Constructora, S.A. de C.V. (2) 44,264 — — Actica Sistemas, S.A. de C.V. (2) 5,887 — — Ingenieros Civiles Asociados, S.A. de C.V. (2) — 37,866 1,110 VCD Construcción y Desarrollo, S.A.P.I. de C. V. (2) 3,612 8,166 — Ps. 98,017 Ps. 46,032 Ps. 1,110
Schedule of accounts payable with related parties	December 31, Payable: 2017 2016 2015 Empresas ICA, S.A.B. de C.V. “EMICA” (1) Ps. — Ps. 18,763 Ps. 10,558 Servicios de Tecnología Aeroportuaria, S.A. de C.V. “SETA” (2) 82,501 74,266 41,287 Nacional Hispana Hoteles, S. de R. L. de C. V. (2) — 5,316 14,559 Operadora Nacional Hispana, S.A. de C.V. (2) 7,985 6,110 — VCD Construcción y Desarrollo, S.A.P.I. de C.V. (2) 4,773 26,325 — ICA Ingeniería S. A. de C. V. (2) 367 7,155 — Actica Sistemas, S. de R.L. de C.V. 1,496 1,760 — Grupo ICA, S.A. de C.V. 16,592 — — GGA Capital, S.A.P.I. de C.V. 14,700 — — ICA Constructora de Infraestructura, S.A. de C.V. 783 — — Grupo Hotelero Santa Fe, S. A. de C. V. (2) 825 633 1,117 Ps. 130,022 Ps. 140,328 Ps. 67,521 (1) Holding Company (2) Affiliated company
Schedule of principal transactions with related parties performed in the normal course of business	Year ended December 31, 2017 2016 2015 Capital Investment: SAP Ps. — Ps. — Ps. 10,706 Hotel — 340 — Industrial warehouse 46,172 103,235 29,067 Expenses: Technical assistance payments received 135,074 117,987 97,818 Administrative services 66,783 51,950 22,061 Major maintenance and improvements on concessioned assets: Platform 10,405 — 3,162 Runway — — 29,089 Improvements to concessioned assets: Construction terminal 210,098 — — Platform — 21,694 —

Operating segment data (Tables)

Operating segment data (Tables)	12 Months Ended
	Dec. 31, 2017
Operating segment data
Schedule of operating segment data	Construction Depreciation Major Allowance for Investments Aeronautical Non-aeronautical services and maintenance doubtful Operating Interest Interest Assets per Liabilities per Capital in airport December 31, 2017 revenues revenues revenues amortization provision accounts income expense income Income tax segment segment investments concessions Metropolitan Monterrey Ps. 2,046,097 Ps. 547,586 Ps. 367,214 Ps. 84,132 Ps. 72,284 Ps. (4,263) Ps. 518,737 Ps. 7,975 Ps. (24,111) Ps. 100,978 Ps. 4,993,403 Ps. 826,644 Ps. 505,445 Ps. 2,785,385 Tourist Acapulco 158,448 34,089 372,253 20,105 8,475 (1,443) 38,531 4,764 (4,845) (648) 1,197,164 282,120 372,253 996,944 Mazatlán 249,479 47,819 30,205 15,815 16,913 (168) 59,470 4,259 (20,699) 15,213 1,128,244 150,567 30,223 508,123 Zihuatanejo 167,550 27,334 28,039 17,347 20,566 (445) 38,977 9,886 (7,494) 4,367 596,780 116,609 28,138 520,632 Regional Chihuahua 308,746 52,742 122,412 12,682 18,446 (4) 72,298 12,251 (21,242) 17,271 903,724 213,533 122,448 460,816 Culiacan 409,399 53,296 43,362 16,147 10,368 (1,159) 92,556 7,637 (7,940) 20,847 816,623 126,234 44,389 508,523 Durango 100,884 11,061 19,974 6,140 18,130 282 22,389 6,712 (8,174) 954 292,704 67,734 19,991 170,869 San Luis Potosi 149,823 24,603 108,756 7,934 29,556 (1,275) 29,078 4,791 (8,272) 7,570 449,272 232,186 108,756 316,361 Tampico 171,550 25,859 46,740 7,697 14,583 (1,627) 39,483 2,674 (3,441) 8,418 316,409 83,646 46,740 254,622 Torreon 156,158 22,478 20,018 8,726 19,361 (59) 35,743 8,382 (9,902) 7,019 371,887 111,569 20,018 264,450 Zacatecas 95,153 12,172 19,175 6,815 19,843 46 19,354 3,487 (4,465) 3,495 276,803 90,328 19,175 208,814 Border Ciudad Juarez 244,891 40,676 31,917 11,103 31,042 (95) 57,113 4,441 (10,987) 13,507 480,320 124,745 33,404 355,659 Reynosa 104,311 15,094 127,353 6,616 11,471 (362) 23,881 — 1,313 2,819 440,857 208,144 127,353 305,411 Hotel NH T2 Hotel — 250,777 — 20,799 — — 75,797 5,537 (876) 15,454 289,844 32,374 1,338 — Hilton Garden Inn — 90,875 — 10,111 — 54 25,680 2,329 (3,857) 3,753 250,264 8,857 9,090 — Industrial Park: VYNMSA — 12,914 — 9,200 — — (1,767) 373 (2,034) (3,053) 242,220 43,260 70,726 — Other — 4,034,440 — 37,836 — (43) 3,353,545 317,471 (40,411) 595,109 13,789,549 5,756,750 30,664 — Total 4,362,489 5,303,815 1,337,418 299,205 291,038 (10,561) 4,500,865 402,969 (177,437) 813,073 26,836,067 8,475,300 1,590,151 7,656,609 Eliminations (15,458) (3,847,477) (10,960) — — — (1,261,746) (50,147) 50,147 — (12,635,267) (1,503,815) (8,192) (8,192) Consolidated Ps. 4,347,031 Ps. 1,456,338 Ps. 1,326,458 Ps. 299,205 Ps. 291,038 Ps. (10,561) Ps. 3,239,119 Ps. 352,822 Ps. (127,290) Ps. 813,073 Ps. 14,200,800 Ps. 6,971,485 Ps. 1,581,959 Ps. 7,648,417 Construction Depreciation Major Allowance for Investments Aeronautical Non-aeronautical services and maintenance doubtful Operating Interest Interest Assets per Liabilities per Capital in airport December 31, 2016 revenues revenues revenues amortization provision accounts income expense income Income tax segment segment investments concessions Metropolitan Monterrey Ps. 1,799,823 Ps. 560,016 Ps. 97,631 Ps. 76,016 Ps. 64,794 Ps. (1,417) Ps. 473,916 Ps. 1,136 Ps. (39,945) Ps. 119,677 Ps. 4,868,188 Ps. 658,768 Ps. 98,585 Ps. 2,492,242 Tourist Acapulco 149,214 30,446 76,772 19,466 2,934 (521) 39,461 411 (13,246) 5,197 1,085,908 113,528 77,069 641,082 Mazatlán 221,522 46,879 19,527 15,458 12,490 (196) 55,052 428 (27,820) 14,978 1,021,766 128,287 19,632 492,692 Zihuatanejo 141,091 26,280 25,699 16,680 17,170 85 35,945 932 (7,736) 5,705 596,541 114,706 25,822 507,683 Regional Chihuahua 272,921 48,374 16,061 11,853 28,066 (1,011) 64,258 2,102 (23,510) 20,277 793,881 170,004 16,202 349,021 Culiacan 351,096 48,280 9,608 16,006 11,251 764 79,875 383 (8,017) 20,524 726,063 117,342 9,896 479,351 Durango 98,550 11,026 4,381 5,965 14,649 (286) 19,017 — (5,739) 4,200 290,258 58,281 4,478 155,540 San Luis Potosi 130,337 23,666 24,456 7,105 28,384 711 30,801 — (13,166) 11,286 293,618 89,123 24,553 214,064 Tampico 162,389 22,735 32,053 6,567 10,782 1,907 37,025 — (3,016) 10,685 306,466 90,438 32,157 214,318 Torreon 151,251 20,087 5,722 8,515 16,916 186 34,268 9 (8,265) 10,537 372,001 90,046 5,834 251,932 Zacatecas 87,616 10,120 7,677 6,656 17,315 (2) 19,547 150 (8,396) 6,891 286,407 74,939 7,789 195,325 Border Ciudad Juarez 208,042 34,351 9,905 10,334 24,025 507 48,478 147 (12,530) 14,819 452,024 111,710 10,005 334,050 Reynosa 113,506 14,150 23,847 6,290 19,240 212 25,539 179 (7,364) 7,923 282,249 67,237 23,944 183,446 Hotel NH T2 Hotel — 227,884 — 20,739 — 240 68,595 11,497 (639) 15,505 290,685 85,543 2,095 — Hilton Garden Inn — 83,625 — 9,268 — — 22,222 2,171 (986) 4,244 234,123 15,996 13,410 — Industrial Park: VYNMSA — 4,952 — 3,416 — — (3,063) — (238) (1,315) 194,209 32,577 104,326 — Other — 4,847,425 — 36,300 — (430) 2,843,210 345,728 (53,566) 475,649 13,052,525 5,554,128 62,163 — Total 3,887,358 6,060,296 353,339 276,634 268,016 749 3,894,146 365,273 (234,179) 746,782 25,146,912 7,572,653 537,960 6,510,746 Eliminations (14,623) (4,727,534) (8,567) — (5,145) — (1,110,592) (34,579) 34,579 — (11,601,589) (714,310) (8,567) 2,768 Consolidated Ps. 3,872,735 Ps. 1,332,762 Ps. 344,772 Ps. 276,634 Ps. 262,871 Ps. 749 Ps. 2,783,554 Ps. 330,694 Ps. (199,600) Ps. 746,782 Ps. 13,545,323 Ps. 6,858,343 Ps. 529,393 Ps. 6,513,514 Construction Depreciation Major Allowance for Investments Aeronautical Non-aeronautical services and maintenance doubtful Operating Interest Interest Assets per Liabilities per Capital in airport December 31, 2015 revenues revenues revenues amortization provision accounts income expense income Income tax segment segment investments concessions Metropolitan Monterrey Ps. 1,443,311 Ps. 484,111 Ps. 70,999 Ps. 76,353 Ps. 24,327 Ps. 293 Ps. 365,471 Ps. 4,044 Ps. (11,285) Ps. 91,560 Ps. 4,501,117 Ps. 626,259 Ps. 73,221 Ps. 2,464,006 Tourist Acapulco 138,309 27,864 81,869 18,737 21,621 (133) 21,329 832 (7,663) 1,582 1,044,502 113,932 84,354 587,517 Mazatlán 168,703 40,820 41,487 14,487 (4,949) (576) 40,170 5,283 (16,671) 10,389 934,612 100,921 43,502 487,516 Zihuatanejo 118,736 23,751 57,943 15,073 (73) (203) 27,338 2,731 (284) 3,844 605,538 148,768 60,483 496,394 Regional Chihuahua 196,033 40,204 3,769 12,025 30,246 934 26,553 (1,888) (11,847) 8,991 721,935 159,632 3,933 342,739 Culiacan 255,921 39,981 34,058 15,899 23,338 (102) 40,763 12,319 (1,911) 8,843 683,797 141,263 35,579 487,393 Durango 63,186 9,080 2,992 5,867 23,868 392 10,991 (6,799) (259) 3,513 281,816 64,356 4,948 155,568 San Luis Potosi 99,341 20,482 4,668 7,431 (16,415) 757 22,686 1,859 (437) 7,575 287,251 117,833 4,760 195,097 Tampico 144,178 22,810 9,589 6,655 21,551 (2,146) 32,793 4,361 (1,389) 2,284 276,428 84,117 9,691 187,509 Torreon 110,480 18,191 14,796 8,484 1,431 (339) 25,065 (3,238) (1,120) 7,392 361,616 111,837 14,849 253,471 Zacatecas 66,957 9,304 10,294 6,719 10,768 (1,193) 11,601 (2,559) (439) 3,433 279,613 89,086 10,488 193,119 Border Ciudad Juarez 146,201 29,225 9,512 10,658 29,265 775 28,593 1,240 (1,195) 7,890 424,666 94,148 11,391 333,676 Reynosa 95,742 12,557 6,012 6,127 9,315 (278) 14,373 (954) (284) 3,144 263,490 73,408 6,384 164,600 Hotel NH T2 Hotel — 212,488 — 20,506 — — 60,142 14,536 (595) 14,830 311,178 149,555 1,605 — Hilton Garden Inn — 16,882 — 1,163 — — (984) 369 (583) (634) 212,412 10,984 95,078 — Other — 3,639,434 — 12,625 — 716 1,916,865 342,813 (65,028) 337,238 11,673,674 5,503,723 88,080 — Total 3,047,098 4,647,184 347,988 238,809 174,293 (1,103) 2,643,749 374,949 (120,990) 511,874 22,863,645 7,589,822 548,346 6,348,605 Eliminations (13,968) (3,535,643) — — — — (607,194) (40,185) 40,250 236 (10,353,309) (1,030,013) — — Consolidated Ps. 3,033,130 Ps. 1,111,541 Ps. 347,988 Ps. 238,809 Ps. 174,293 Ps. (1,103) Ps. 2,036,555 Ps. 334,764 Ps. (80,740) Ps. 512,110 Ps. 12,510,336 Ps. 6,559,809 Ps. 548,346 Ps. 6,348,605

Cost of services (Tables)

Cost of services (Tables)	12 Months Ended
	Dec. 31, 2017
Cost of services
Schedule of cost of services	Year ended December 31, 2017 2016 2015 Wages and salaries Ps. 219,890 Ps. 203,912 Ps. 191,660 Maintenance 184,246 157,740 147,923 Security and insurance 176,197 167,678 153,011 Utilities (electric, cleaning and water) 189,238 158,956 135,825 Building lease 45,181 41,031 38,265 Allowance for doubtful accounts (10,561) 749 (1,103) Cost of hotel service 65,034 58,607 42,742 Employee statutory profit sharing 1,568 2,121 2,411 Equipment lease, fees and others 110,272 109,347 125,399 Ps. 981,065 Ps. 900,141 Ps. 836,133

Nature of business operations (

Nature of business operations (Details)	Dec. 31, 2017item
Nature of business operations
Number of airports under a concession granted	13

Significant events (Details)

Significant events (Details) - MXN ($) $ / shares in Units, $ in Thousands	May 31, 2017	May 16, 2017	Apr. 28, 2017	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Significant events
Cash dividend approved			$ 1,600,000
Single installment per share			$ 4
Dividend paid		$ 1,575,083			$ 1,575,083	$ 1,371,641
Share repurchase reserve approved			$ 1,500,000
Reserve created					$ 116,875
ADPM
Significant events
Percentage of shareholding exchanged				25.50%
Partner ownership interest				4.30%
Ownership interest held				25.50%
CONOISA
Significant events
Ownership interest held				74.50%
Empresas ICA
Significant events
Percentage of shareholding exchanged				100.00%
Partner ownership interest				12.60%
Ownership interest indirectly held				1.90%
Series B Class I
Significant events
Number of shares cancelled	6,229,027

Basis of presentation and con56

Basis of presentation and consolidation (Details)	12 Months Ended
	Dec. 31, 2017$ / $
Convenience translation
Exchange rate	19.7354

Significant accounting polici57

Significant accounting policies (Details)	12 Months Ended
	Dec. 31, 2017
Improvement in leased assets
Property, leasehold improvements and equipment, net
Useful Life (years)	20 years
Machinery and equipment
Property, leasehold improvements and equipment, net
Useful Life (years)	10 years
Furniture and office equipment
Property, leasehold improvements and equipment, net
Useful Life (years)	10 years
Transportation equipment
Property, leasehold improvements and equipment, net
Useful Life (years)	4 years
Computer equipment
Property, leasehold improvements and equipment, net
Useful Life (years)	3 years 3 months 18 days

Significant accounting polici58

Significant accounting policies - Investment in airport concessions (Details)	12 Months Ended
	Dec. 31, 2017item
Investment in airport concessions.
Number of airports under a concession granted	13
Concession period granted by the Mexican Government through the Ministry of Communications and Transportation, and to use their facilities (in years)	50 years
Provisions
Period for estimated major maintenance costs review and updation	5 years
Revenue recognition
Time lag with respect to the commercial revenues for those tenants whose stated percentage of monthly income is greater than the minimum monthly fee (in months)	1 month

Critical accounting judgments59

Critical accounting judgments and key sources of estimation uncertainty (Details) $ in Thousands	Dec. 31, 2017MXN ($)
Terminal 2 NH Hotel
Critical accounting judgments and key sources of estimation uncertainty
Net book value	$ 277,344

Cash and cash equivalents (Deta

Cash and cash equivalents (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016USD ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2014MXN ($)
Cash and cash equivalents
Cash		$ 602,074		$ 1,052,860	$ 86,388
Total cash and cash equivalents	$ 118,214	2,333,007	$ 152,305	3,005,792	2,605,196	$ 2,808,149
Bank notes
Cash and cash equivalents
Cash equivalents		1,269,090		932,638	1,574,653
Commercial paper
Cash and cash equivalents
Cash equivalents		139,870		124,361	349,297
Money market investment funds
Cash and cash equivalents
Cash equivalents		$ 321,973		$ 895,933	$ 594,858

Accounts receivable (Details)

Accounts receivable (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017MXN ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2014MXN ($)
Accounts receivable
Receivables			$ 668,980	$ 781,612	$ 458,518
Allowance for doubtful accounts			(38,223)	(67,482)	(67,733)	$ (184,579)
Net receivables		$ 31,961	630,757	714,130	390,785
Interest income from accounts receivable	$ 0
Accounts receivable for passenger charges			$ 486,650	$ 567,818	$ 309,711

Accounts receivable - Percentag

Accounts receivable - Percentage of revenues by client (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts Receivable
Allowance for doubtful accounts	$ 38,223	$ 67,482	$ 67,733	$ 184,579
Aeroenlaces Nacionales, S. A. de C. V.
Accounts Receivable
Percentage of entity's accounts receivable	20.40%	19.25%	16.99%
Percentage of entity's revenue	15.19%	13.72%	12.54%
Concesionaria Vuela Compañía de Aviacion, S.A.P.I. de C.V.
Accounts Receivable
Percentage of entity's accounts receivable	18.14%	18.42%	4.80%
Percentage of entity's revenue	12.74%	13.43%	9.35%
ABC Aerolíneas, S. A. de C. V.
Accounts Receivable
Percentage of entity's accounts receivable	1.08%	8.41%	5.90%
Percentage of entity's revenue	11.06%	11.93%	13.45%
Aerolitoral, S. A. de C. V.
Accounts Receivable
Percentage of entity's accounts receivable	24.21%	17.68%	21.04%
Percentage of entity's revenue	14.17%	14.33%	15.59%
Compañía Mexicana de Aviación, S. A. de C. V., Aerovias Caribe, S. A. de C. V. y Mexicana Inter, S. A. de C. V.
Accounts Receivable
Percentage of entity's accounts receivable		0.60%	2.97%
Amount owed from clients fully reserved		$ 13,611	$ 13,611
Aerovías de México, S. A. de C.V.
Accounts Receivable
Percentage of entity's accounts receivable	6.01%	6.27%	8.20%
Percentage of entity's revenue	4.85%	5.08%	5.98%

Accounts receivable - Change in

Accounts receivable - Change in allowances (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts receivable
Beginning balance	$ 67,482	$ 67,733	$ 184,579
Increase (decrease)	(10,561)	749	(1,103)
Write-off	(18,698)	(1,000)	(115,743)
Ending balance	$ 38,223	$ 67,482	$ 67,733

Accounts receivable - Change 64

Accounts receivable - Change in allowances - Grupo Mexicana (Details) - MXN ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts receivable
Allowance for doubtful accounts current	$ 38,223	$ 67,482	$ 67,733	$ 184,579

Accounts receivable - Aging of

Accounts receivable - Aging of accounts receivables (Details) - MXN ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Account receivable
Accounts receivable past due but not reserved	$ 55,742	$ 139,139	$ 54,270
1 - 120 days
Account receivable
Accounts receivable past due but not reserved	41,294	104,318	39,969
121 - 360 days
Account receivable
Accounts receivable past due but not reserved	$ 14,448	$ 34,821	$ 14,301

Other accounts receivable and66

Other accounts receivable and prepaid expenses (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Other accounts receivable and prepaid expenses.
Prepaid expenses		$ 23,310	$ 14,316	$ 18,529
Guarantee deposits		5,800	5,844	6,512
Others		9,746	8,745	4,983
Total	$ 1,969	$ 38,856	$ 28,905	$ 30,024

Property, leasehold improveme67

Property, leasehold improvements and equipment (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Property, leasehold improvements and equipment, net
Property, plant and equipment	$ 131,814	$ 2,601,397	$ 2,444,205	$ 2,370,975
Land
Property, leasehold improvements and equipment, net
Property, plant and equipment		1,709,508	1,707,236	1,715,636
Leasehold improvements
Property, leasehold improvements and equipment, net
Property, plant and equipment		660,589	456,505	424,511
Machinery and equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment		116,117	130,349	146,626
Furniture and office equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment		47,113	50,835	61,200
Transportation equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment		36,246	9,042	8,548
Computer equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment		9,483	12,020	$ 14,454
Construction in progress for leasehold improvements
Property, leasehold improvements and equipment, net
Property, plant and equipment		$ 22,341	$ 78,218

Property, leasehold improveme68

Property, leasehold improvements and equipment - Roll-forward - Cost (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		$ 2,444,205	$ 2,370,975
Property, plant and equipment at end of period	$ 131,814	2,601,397	2,444,205	$ 2,370,975
Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		2,811,990	2,670,958	2,524,678
Acquisitions		235,091	153,118	148,657
Disposals		(4,843)	(12,086)	(1,024)
Other		(1,699)		(1,353)
Property, plant and equipment at end of period		3,040,539	2,811,990	2,670,958
Accumulated depreciation
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		(367,785)	(299,983)	(240,364)
Disposals		4,579	3,038	890
Other		1,779		1,356
Depreciation		(77,715)	(70,840)	(61,865)
Property, plant and equipment at end of period		(439,142)	(367,785)	(299,983)
Land
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		1,707,236	1,715,636
Property, plant and equipment at end of period		1,709,508	1,707,236	1,715,636
Land | Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		1,707,236	1,715,636	1,715,636
Acquisitions		2,272
Disposals			(8,400)
Property, plant and equipment at end of period		1,709,508	1,707,236	1,715,636
Leasehold improvements
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		456,505	424,511
Property, plant and equipment at end of period		660,589	456,505	424,511
Leasehold improvements | Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		586,016	526,393	338,393
Acquisitions		107,735	12,963
Transfers		(131,730)	46,660	188,000
Property, plant and equipment at end of period		825,481	586,016	526,393
Leasehold improvements | Accumulated depreciation
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		(129,511)	(101,882)	(83,154)
Other		(39)
Depreciation		(35,342)	(27,629)	(18,728)
Property, plant and equipment at end of period		(164,892)	(129,511)	(101,882)
Machinery and equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		130,349	146,626
Property, plant and equipment at end of period		116,117	130,349	146,626
Machinery and equipment | Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		196,861	194,638	179,697
Acquisitions		4,502	2,223	14,941
Disposals		(249)
Property, plant and equipment at end of period		201,114	196,861	194,638
Machinery and equipment | Accumulated depreciation
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		(66,512)	(48,012)	(29,980)
Other		189
Depreciation		(18,674)	(18,500)	(18,032)
Property, plant and equipment at end of period		(84,997)	(66,512)	(48,012)
Furniture and office equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		50,835	61,200
Property, plant and equipment at end of period		47,113	50,835	61,200
Furniture and office equipment | Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		147,145	144,983	133,757
Acquisitions		6,393	2,787	11,407
Disposals			(625)
Other		(183)		(181)
Property, plant and equipment at end of period		153,355	147,145	144,983
Furniture and office equipment | Accumulated depreciation
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		(96,310)	(83,783)	(71,194)
Other		180		179
Depreciation		(10,112)	(12,527)	(12,768)
Property, plant and equipment at end of period		(106,242)	(96,310)	(83,783)
Transportation equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		9,042	8,548
Property, plant and equipment at end of period		36,246	9,042	8,548
Transportation equipment | Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		32,318	29,121	28,043
Acquisitions		34,531	6,227	2,102
Disposals		(4,532)	(3,030)	(1,024)
Other		(1,274)
Property, plant and equipment at end of period		61,043	32,318	29,121
Transportation equipment | Accumulated depreciation
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		(23,276)	(20,573)	(15,554)
Disposals		4,532	3,007	890
Other		1,211
Depreciation		(7,264)	(5,710)	(5,909)
Property, plant and equipment at end of period		(24,797)	(23,276)	(20,573)
Computer equipment
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		12,020	14,454
Property, plant and equipment at end of period		9,483	12,020	14,454
Computer equipment | Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		64,196	60,187	50,481
Acquisitions		3,805	4,040	10,878
Disposals		(62)	(31)
Other		(242)		(1,172)
Property, plant and equipment at end of period		67,697	64,196	60,187
Computer equipment | Accumulated depreciation
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		(52,176)	(45,733)	(40,482)
Disposals		47	31
Other		238		1,177
Depreciation		(6,323)	(6,474)	(6,428)
Property, plant and equipment at end of period		(58,214)	(52,176)	(45,733)
Construction in progress for leasehold improvements
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		78,218
Property, plant and equipment at end of period		22,341	78,218
Construction in progress for leasehold improvements | Cost
Property, leasehold improvements and equipment, net
Property, plant and equipment at beginning of period		78,218		78,671
Acquisitions		75,853	124,878	109,329
Transfers		131,730	(46,660)	$ (188,000)
Property, plant and equipment at end of period		$ 22,341	$ 78,218

Property, leasehold improveme69

Property, leasehold improvements and equipment - Operation of Terminal (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, leasehold improvements and equipment, net
Projected occupancy rate for 2018	88.00%
Projected occupancy rate for 2019-2022	82.00%
Discount rate applied to cash flow projections	8.85%	9.42%	6.85%
Terminal Two NH Hotel
Property, leasehold improvements and equipment, net
Projected occupancy rate for 2023	53.00%
Projected occupancy rate for 2024	63.00%
Comparable market occupancy rate	71.00%
Discount rate applied to cash flow projections	24.53%

Investments in airport concessi

Investments in airport concessions (Details)	12 Months Ended
	Dec. 31, 2017item
Disclosure of detailed information about intangible assets [line items]
Number of airports under a concession granted	13
Airport concessions
Disclosure of detailed information about intangible assets [line items]
Number of airports under a concession granted	13
Term of concession arrangement	50 years
Maximum extension term of concession arrangement	50 years
Term of master development program	5 years
Concessionaire tax rate	5.00%

Investments in airport conces71

Investments in airport concessions - Carrying value and changes (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Reconciliation of changes in intangible assets other than goodwill
Investment in concessions at beginning of period		$ 6,513,514	$ 6,348,605
Investment in concessions at end of period	$ 387,548	7,648,417	6,513,514	$ 6,348,605
Cost
Reconciliation of changes in intangible assets other than goodwill
Investment in concessions at beginning of period		8,495,121	8,150,349	7,807,228
Increase		1,326,458	344,772	347,988
Disposals				(4,867)
Investment in concessions at end of period		9,821,579	8,495,121	8,150,349
Accumulated depreciation and amortization
Reconciliation of changes in intangible assets other than goodwill
Investment in concessions at beginning of period		(1,981,607)	(1,801,744)	(1,626,951)
Increase		(191,555)	(179,863)	(175,106)
Disposals				313
Investment in concessions at end of period		(2,173,162)	(1,981,607)	(1,801,744)
Airport concessions
Reconciliation of changes in intangible assets other than goodwill
Investment in concessions at beginning of period		605,643	605,643
Investment in concessions at end of period		605,643	605,643	605,643
Rights to use airport facilities
Reconciliation of changes in intangible assets other than goodwill
Investment in concessions at beginning of period		3,356,762	3,356,762
Investment in concessions at end of period		3,356,762	3,356,762	3,356,762
Improvements to concessioned assets
Reconciliation of changes in intangible assets other than goodwill
Investment in concessions at beginning of period		4,532,716	4,187,944
Investment in concessions at end of period		$ 5,859,174	$ 4,532,716	$ 4,187,944

Investments in airport conces72

Investments in airport concessions - Master Development Plan (Details) - Master Development Plan - MXN ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 04, 2012	Dec. 31, 2009
Disclosure of detailed information about intangible assets [line items]
Master development program obligations using 2014 values	$ 4,445,653
Master development program obligations using 2016 values	5,443,013
Master development program obligations	3,554,823
Land acquired that may potentially be included as investment in airport concessions		$ 695,759		$ 1,159,613
Land acquired that was authorized to be included as investment in airport concessions			$ 386,538
Land acquired that represents an additional amount authorized to be included as investment in airport concessions			$ 77,306
2,018
Disclosure of detailed information about intangible assets [line items]
Master development program obligations	2,377,074
2,019
Disclosure of detailed information about intangible assets [line items]
Master development program obligations	711,353
2,020
Disclosure of detailed information about intangible assets [line items]
Master development program obligations	$ 466,396

Composition of GACN (Details)

Composition of GACN (Details)	Dec. 31, 2017item
Disclosure of transactions between related parties [line items]
Number of subsidiaries	24
Airports
Disclosure of transactions between related parties [line items]
Number of subsidiaries	13
Hotels
Disclosure of transactions between related parties [line items]
Number of subsidiaries	2
Services
Disclosure of transactions between related parties [line items]
Number of subsidiaries	9

Composition of GACN - Consolida

Composition of GACN - Consolidated subsidiaries (Details)	12 Months Ended	36 Months Ended
	Dec. 31, 2017	Dec. 31, 2017
Aeropuerto de Monterrey, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Acapulco, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Mazatlan, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Zihuatanejo, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Culiacan, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Ciudad Juarez, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Chihuahua, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Torreon, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Durango, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Tampico, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Reynosa, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de Zacatecas, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Aeropuerto de San Luis Potosi, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Operadora de Aeropuertos del Centro Norte, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Servicios Aeroportuarios del Centro Norte, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Servicios Aero Especializados del Centro Norte, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
OMA Logistica, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Holding Consorcio Grupo Hotelero T2, S. A. de C. V.
Disclosure of transactions between related parties [line items]
Ownership percentage		100.00%
Hotels | OMA VYNMSA Aero Industrial Park
Disclosure of transactions between related parties [line items]
Ownership percentage	51.00%
Hotels | Consorcio Hotelero Aeropuerto de Monterrey, S.A.P.I de C.V.
Disclosure of transactions between related parties [line items]
Ownership percentage	85.00%
Hotels | Servicios Hoteleros Aeropuerto de Monterrey, S.A. de C.V.
Disclosure of transactions between related parties [line items]
Ownership percentage	85.00%
Hotels | Servicios Complementarios del Centro Norte, S.A. de C.V.
Disclosure of transactions between related parties [line items]
Ownership percentage	100.00%
Hotels | Servicios Corporativos Terminal 2, S.A. de C.V.
Disclosure of transactions between related parties [line items]
Ownership percentage	100.00%
Hotels | Consorcio Grupo Hotelero T2, S.A. de C.V.
Disclosure of transactions between related parties [line items]
Ownership percentage	90.00%

Trade accounts payable (Details

Trade accounts payable (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Trade accounts payable
Suppliers and contractors		$ 207,190	$ 212,939	$ 165,165
Other accounts payable		42,317	39,892	78,702
Statutory employee profit sharing		6,475	9,242	9,491
Trade accounts payable	$ 12,971	$ 255,982	$ 262,073	$ 253,358

Payable taxes and other accru76

Payable taxes and other accrued expenses (Details) - MXN ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Payable taxes and other accrued expenses
Accrued expenses	$ 145,123	$ 183,175	$ 171,046
Taxes payable other than income tax	220,524	262,772	158,589
Accrued interest	69,125	43,254	42,425
Total payable taxes and other accrued expenses	$ 434,772	$ 489,201	$ 372,060

Short-term debt (Details)

Short-term debt (Details) $ in Thousands	Dec. 31, 2017MXN ($)
Short-term line of credit
Short-term debt
Short-term credit lines available amount	$ 350,000

Long-term debt (Details)

Long-term debt (Details) $ in Thousands	Jun. 16, 2014MXN ($)item	Mar. 26, 2013MXN ($)item	Dec. 31, 2017USD ($)item	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2014MXN ($)item	Dec. 31, 2013MXN ($)	Dec. 31, 2017MXN ($)item	Dec. 31, 2016USD ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015USD ($)	Dec. 31, 2015MXN ($)	Apr. 20, 2014USD ($)	Dec. 31, 2012USD ($)
Long-term debt
Total long-term debt									$ 4,644,387		$ 4,707,303		$ 4,729,388
Less: Financing commissions and issuance costs									(11,115)		(13,438)		(15,606)
Net long-term debt									4,633,272		4,693,865		4,713,782
Current portion of long-term debt			$ (2,577,000)						(50,852)		(56,122)		(55,433)
Long-term debt			232,193,000						$ 4,582,420		4,637,743		4,658,349
Principal amount			$ 51,168,000							$ 58,875,000		$ 52,765,000
Number of airports guaranteeing the certificates | item							9
Number of airports | item			13						13
Percentage of airports guaranteeing the certificates (as a percent)							80.00%
Exchange loss, net			$ (3,196,000)	$ (63,072)	$ (29,177)	$ (33,784)
Debt securities issued in the Mexican market on June 16, 2014
Long-term debt
Total long-term debt									$ 3,000,000		3,000,000		3,000,000
Principal amount	$ 3,000,000						$ 3,000,000
Term of loan	7 years						7 years
Number of airports guaranteeing the certificates | item	9
Number of airports | item	13
Percentage of airports guaranteeing the certificates (as a percent)	80.00%
Interest rate (as a percent)	6.85%
Debt securities issued in the Mexican market on March 26, 2013
Long-term debt
Total long-term debt									1,500,000		1,500,000		1,500,000
Principal amount		$ 1,500,000						$ 1,500,000
Term of loan		10 years						10 years
Number of airports guaranteeing the certificates | item		9
Number of airports | item		13
Percentage of airports guaranteeing the certificates (as a percent)		80.00%
Interest rate (as a percent)		6.47%
Unsecured lines of credit with Private Export Funding Corporation
Long-term debt
Total long-term debt									$ 128,991		$ 175,410		$ 181,050
Maximum borrowing capacity			20,385,000
Outstanding amounts			$ 6,536,000							$ 8,489,000		$ 10,441,000
Interest rate basis			three-month LIBOR	three-month LIBOR
Rate spread on Three-month LIBOR rate			1.25%						1.25%
Interest rate (as a percent)			2.94%						2.94%	2.25%	2.25%	1.86%	1.86%
Line of credit with UPS Capital Business Credit
Long-term debt
Total long-term debt									$ 15,396		$ 29,016		$ 35,170
Maximum borrowing capacity														$ 3,120,000
Outstanding amounts			$ 780,000							$ 1,404,000		$ 2,028,000
Interest rate basis			three-month LIBOR	three-month LIBOR
Rate spread on Three-month LIBOR rate			2.65%						2.65%
Interest rate (as a percent)			4.34%						4.34%	3.65%	3.65%	3.26%	3.26%
Firefighting equipment carrying value recorded as improvements to concessioned assets									$ 44,590		$ 53,421		$ 62,251
Unsecured line of credit with UPS Capital Business Credit
Long-term debt
Total long-term debt											2,877		13,168
Maximum borrowing capacity															$ 2,775,000
Outstanding amounts										$ 139,000		$ 759,000
Unsecured lines of credit with Private Export Funding Corporation and Unsecured line of credit with UPS Capital Business Credit
Long-term debt
Baggage screening equipment carrying value recorded as improvements to concessioned assets									$ 292,922		$ 301,835		$ 310,749
Bank Loans
Long-term debt
Exchange loss, net				$ 11,748	$ (36,790)	$ (40,121)

Major maintenance provision (De

Major maintenance provision (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2014MXN ($)
Major maintenance provision.
Discount rate	8.85%		9.42%	6.85%	8.85%
Major maintenance of concessioned assets			$ 669,653	$ 603,703		$ 592,789
Additions		$ 285,755	168,804	182,561
Disbursements	$ (4,955)	(97,784)	(102,854)	(171,647)
Short-term			160,607	220,410	$ 232,645
Long-term	31,668		509,046	383,293	$ 624,979
Present value of major maintenance provision	$ (278)	$ (5,477)	$ (94,072)	$ 8,268

Labor obligations (Details)

Labor obligations (Details) - MXN ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2011
Labor obligations
Defined contribution plan, vesting percentage through fifth year	50.00%
Defined contribution plan, annual vesting percentage after fifth year	10.00%
Defined contribution plan, vesting percentage subsequent years	100.00%
Defined contribution plan, expense	$ 1,105	$ 1,666	$ 1,460
Defined contribution plan, payable to trust	$ 541	$ 2,628	$ 2,232
Defined benefit plan
Labor obligations
Seniority premiums singe payment equivalent, in days	12 days
Maximum seniority premiums singe payment equivalent, in days	20 days
Maximum single payment equivalent based on pensionable salary, in days	90 days
Early retirement age				60 years
Minimum service term for early retirement				10 years

Labor obligations - Actuarial a

Labor obligations - Actuarial assumptions (Details) - Defined benefit plan - item	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Labor obligations
Discount rate	7.75%	7.75%	7.25%
Expected rate of salary increase	4.50%	4.50%	4.50%
Average longevity at retirement age for current pensioners (in years)	14	15	12
Inflation	3.50%	3.50%	3.50%

Labor obligations - Amounts rec

Labor obligations - Amounts recognized in statement of income and other comprehensive income (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2017MXN ($)
Remeasurement on the net defined benefit liability:
Components of defined benefit costs recognized in other comprehensive income	$ 213	$ 4,199	$ (3,533)	$ 1,286
Present value of defined benefit obligations	$ 6,459		111,921	106,414	$ 127,479
Defined benefit plan
Service cost:
Current service cost		7,995	7,629	7,574
Net interest expense		7,672	6,664	5,627
Components of defined benefit costs recognized in profit and loss		15,667	14,293	13,201
Remeasurement on the net defined benefit liability:
Actuarial gains and losses arising from changes in financial assumptions			(5,815)	(4,554)
Actuarial gains and losses arising from experience adjustments		4,199	2,282	5,840
Components of defined benefit costs recognized in other comprehensive income		4,199	(3,533)	1,286
Total		$ 19,866	10,760	14,487
Present value of defined benefit obligations			$ 111,921	$ 106,414	$ 127,479

Labor obligations - Movements i

Labor obligations - Movements in defined benefit obligation (Details) - Defined benefit plan - Present value of defined benefit obligation - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Changes in net defined benefit liability (asset) [abstract]
Present value of defined benefit obligation at beginning of period	$ 111,921	$ 106,414	$ 94,313
Current service cost	7,995	7,629	7,574
Interest cost	7,672	6,664	5,627
Remeasurement (gains)/losses:
Actuarial gains and losses arising from changes in financial and demographic assumptions		(5,815)	(4,554)
Actuarial gains and losses arising from experience assumptions	4,199	2,282	5,840
Benefits paid	(4,308)	(5,253)	(2,386)
Present value of defined benefit obligation at end of period	$ 127,479	$ 111,921	$ 106,414

Labor obligations - Sensitivity

Labor obligations - Sensitivity analysis (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Average duration period of the benefit obligation	9 years	8 years 9 months 18 days	9 years
Actuarial assumption of discount rates
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase in actuarial assumption (as a percent)	1.00%
Decrease in actuarial assumption (as a percent)	1.00%
Increase in benefit obligation	$ 137,803
Decrease in benefit obligation	$ 118,737
Actuarial assumption of expected rates of salary increases
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase in actuarial assumption (as a percent)	1.00%
Increase in benefit obligation	$ 136,949
Decrease in benefit obligation	$ 119,365

Labor obligations - Expected ca

Labor obligations - Expected cash flows (Details) $ in Thousands	Dec. 31, 2017MXN ($)
Labor obligations
Total	$ 114,645
2,018
Labor obligations
Total	30,414
2,019
Labor obligations
Total	7,904
2,020
Labor obligations
Total	9,902
2,021
Labor obligations
Total	6,859
2,022
Labor obligations
Total	6,881
From 2023 to 2028
Labor obligations
Total	52,685
Defined benefit plan
Labor obligations
Total	98,461
Defined benefit plan | 2018
Labor obligations
Total	28,776
Defined benefit plan | 2019
Labor obligations
Total	6,435
Defined benefit plan | 2020
Labor obligations
Total	8,397
Defined benefit plan | 2021
Labor obligations
Total	5,370
Defined benefit plan | 2022
Labor obligations
Total	5,361
Defined benefit plan | From 2023 to 2028
Labor obligations
Total	44,122
Seniority premium benefits
Labor obligations
Total	16,184
Seniority premium benefits | 2018
Labor obligations
Total	1,638
Seniority premium benefits | 2019
Labor obligations
Total	1,469
Seniority premium benefits | 2020
Labor obligations
Total	1,505
Seniority premium benefits | 2021
Labor obligations
Total	1,489
Seniority premium benefits | 2022
Labor obligations
Total	1,520
Seniority premium benefits | From 2023 to 2028
Labor obligations
Total	$ 8,563

Leases - As Lessee (Details)

Leases - As Lessee (Details) $ in Thousands	Sep. 30, 2016MXN ($)	Oct. 31, 2008MXN ($)	Dec. 31, 2017MXN ($)item	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Operating Lease By Lessee
Costs and leasing expenses			$ 53,070	$ 47,649	$ 44,779
Operating lease commitments by lessee			369,258	325,405	358,371
Total long-term financial lease			37,450
Current portion			(6,592)
Long-term financial lease			$ 30,858
Top of range
Operating Lease By Lessee
Number of monthly rents accrued | item			48
2,018
Operating Lease By Lessee
Operating lease commitments by lessee			$ 37,053	27,950	32,913
Greater than 1 year and less than 5 years
Operating Lease By Lessee
Operating lease commitments by lessee			139,359	104,984	106,739
Greater than 5 years
Operating Lease By Lessee
Operating lease commitments by lessee			$ 192,846	$ 192,471	$ 218,719
Mexico City International Airport
Operating Lease By Lessee
Term of contract		20 years
Minimum guaranteed income		$ 18,453
Royalty of hotel revenue (as a percent)		18.00%
HSBC SA Multiple banking institution
Operating Lease By Lessee
Term of contract	60 months
Minimum rent	$ 638
Minimum annual rent increase (as a percent)	3.00%

Leases - As Lessor (Details)

Leases - As Lessor (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Lease By Lessor
Operating lease commitments by lessor	$ 947,624	$ 1,466,061	$ 966,780
Contingent rental income	204,172	178,469	116,905
2,018
Operating Lease By Lessor
Operating lease commitments by lessor	287,650	402,871	352,644
Greater than 1 year and less than 5 years
Operating Lease By Lessor
Operating lease commitments by lessor	542,063	741,320	521,026
Greater than 5 years
Operating Lease By Lessor
Operating lease commitments by lessor	$ 117,911	$ 321,870	$ 93,110

Income taxes (Details)

Income taxes (Details) $ in Thousands, $ in Thousands	12 Months Ended				36 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2017
Income taxes
Statutary rate (as a percent)	30.00%	30.00%	30.00%	30.00%	30.00%
Current ISR		$ 810,641	$ 672,298	$ 453,066
Deferred ISR		2,432	74,484	59,044
Income tax expense	$ 41,199	$ 813,073	$ 746,782	$ 512,110

Income taxes - Deferred Assets

Income taxes - Deferred Assets and (liabilities) (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2014MXN ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liabilities	$ 9,986	$ 197,081	$ 218,791	$ 201,048
Deferred tax assets	$ 17,635	348,034	380,103	463,260
Net deferred ISR asset		150,953	161,312	262,212	$ 314,430
Provisions, allowances and labor obligations
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liabilities		116,740	99,313	69,288
Deferred tax assets		217,987	190,164	189,002
Leasehold improvements
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liabilities		362,866	419,384	386,888
Deferred tax assets		(281,119)	(303,839)	(360,211)
Tax loss carryforwards
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liabilities		9,955	53,004	42,919
Deferred tax assets		411,166	493,778	634,469
Recoverable tax on assets
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liabilities		39,090	48,276	73,633
Other subsidiary losses
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets		$ 421,121	$ 546,782	$ 677,388

Income taxes - Changes in defer

Income taxes - Changes in deferred tax (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of changes in deferred tax liability (asset) [abstract]
Beginning balance of deferred tax liability, net	$ 161,312	$ 262,212	$ 314,430
Deferred ISR in results	(2,432)	(74,484)	(59,044)
Recoverable tax on assets	(9,186)	(25,356)	6,440
Income tax effects recognized in other comprehensive income	1,259	(1,060)	386
Ending balance of deferred tax asset, net	$ 150,953	$ 161,312	$ 262,212

Income taxes - Reconciliation o

Income taxes - Reconciliation of the statutory income tax rate and effecitve income tax rate (Details) $ in Thousands, $ in Thousands	12 Months Ended				36 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2017
Reconciliation of statutory income tax rate and the effective income tax rate as a percentage of net income before income tax
Income before income taxes	$ 149,504	$ 2,950,515	$ 2,623,283	$ 1,748,747
Current ISR		810,641	672,298	453,066
Deferred ISR		2,432	74,484	59,044
Income tax expense	$ 41,199	813,073	746,782	512,110
Add (deduct) effects of permanent differences, primarily, non-deductible expenses and inflationary effects for financial and tax purposes		71,107	37,513	19,236
Other		975	2,690	(6,722)
Statutary rate		$ 885,155	$ 786,985	$ 524,624
Effective rate (as a percent)	27.56%	27.56%	28.47%	29.28%
Add (deduct) effects of permanent differences, primarily, non-deductible expenses and inflationary effects for financial and tax purposes. (as a percent)	2.41%	2.41%	1.43%	1.10%
Other (as a percent)	0.03%	0.03%	0.10%	(0.38%)
Statutary rate (as a percent)	30.00%	30.00%	30.00%	30.00%	30.00%

Income taxes -Tax loss carryfor

Income taxes -Tax loss carryforwards (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2014MXN ($)	Dec. 31, 2013MXN ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards utilized				$ 506,543
Deferred tax assets		$ 380,103	$ 17,635	348,034	$ 463,260
Other subsidiary losses
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				9,648
Duration of tax losses	10 years
Deferred tax assets		546,782		421,121	$ 677,388
IMPAC
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets							$ 67,193
Updated deferred tax asset						$ 6,440
Deferred tax assets recovered	$ 9,186	$ 25,356
Updated amount of IMPAC recovered	$ 39,090
Mexican Tax Authority
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				1,394,089
Mexican Tax Authority | 2001
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				5,745
Mexican Tax Authority | 2002
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				190,164
Mexican Tax Authority | 2003
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				346,924
Mexican Tax Authority | 2004
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				423,841
Mexican Tax Authority | 2005
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				60,981
Mexican Tax Authority | 2006
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				64,235
Mexican Tax Authority | 2007
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				86,884
Mexican Tax Authority | 2008
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				42,405
Mexican Tax Authority | 2009
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				5,072
Mexican Tax Authority | 2010
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				31,988
Mexican Tax Authority | 2011
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				65,230
Mexican Tax Authority | 2012
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				40,508
Mexican Tax Authority | 2015
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax loss carryforwards				$ 30,112

Income taxes - Shareholders' eq

Income taxes - Shareholders' equity tax accounts (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current and deferred tax relating to items charged or credited directly to equity [abstract]
Total shareholders' equity tax accounts	$ 5,272,006	$ 4,719,240	$ 5,095,595
Contributed capital account
Current and deferred tax relating to items charged or credited directly to equity [abstract]
Total shareholders' equity tax accounts	3,940,312	3,700,652	3,580,472
Net consolidated tax profit account
Current and deferred tax relating to items charged or credited directly to equity [abstract]
Total shareholders' equity tax accounts	$ 1,331,694	$ 1,018,588	$ 1,515,123

Income taxes - Dividend tax (De

Income taxes - Dividend tax (Details)	12 Months Ended
	Dec. 31, 2017
Income taxes
Maximum additional income taxes dividends may be subject to (as a percent)	10.00%

Commitment and contingencies (D

Commitment and contingencies (Details) $ in Thousands, $ in Thousands	Jun. 16, 2014MXN ($)item	Mar. 26, 2013MXN ($)item	Dec. 31, 2014MXN ($)item	Dec. 31, 2013MXN ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Disclosure of contingent liabilities [line items]
Principal amount | $					$ 51,168	$ 58,875	$ 52,765
Number of airports guaranteeing the certificates | item			9
Percentage of airports guaranteeing the certificates (as a percent)			80.00%
Debt securities issued in the Mexican market on June 16, 2014
Disclosure of contingent liabilities [line items]
Principal amount | $	$ 3,000,000		$ 3,000,000
Term of loan	7 years		7 years
Number of airports guaranteeing the certificates | item	9
Percentage of airports guaranteeing the certificates (as a percent)	80.00%
Debt securities issued in the Mexican market on March 26, 2013
Disclosure of contingent liabilities [line items]
Principal amount | $		$ 1,500,000		$ 1,500,000
Term of loan		10 years		10 years
Number of airports guaranteeing the certificates | item		9
Percentage of airports guaranteeing the certificates (as a percent)		80.00%

Commitment and contingencies -

Commitment and contingencies - Property tax (Details) $ in Thousands, $ in Millions	Aug. 27, 2015ft²	Aug. 27, 2015ha	Nov. 05, 1995ha	May 11, 1995USD ($)	Apr. 30, 2016item	Mar. 31, 2014MXN ($)	Aug. 31, 2012MXN ($)	Nov. 30, 2011MXN ($)	Dec. 31, 2017item	Dec. 31, 2017mi²	Dec. 31, 2017ha
Reynosa Airport - Property tax
Disclosure of contingent liabilities [line items]
Loss contingency damages | $						$ 1,361	$ 1,119	$ 127,312
Ciudad Juarex Airport - Municipal licenses
Disclosure of contingent liabilities [line items]
Number of airport businesses ordered for closure | item					10
Reynosa Airport - Conflict with ownership of certain land
Disclosure of contingent liabilities [line items]
Area of land in claim										772	200,000
Number of amparo trials filed | item									2
Ciudad Juarex Airport - Conflict with ownership of certain land
Disclosure of contingent liabilities [line items]
Loss contingency damages | $				$ 120
Area of land in claim | ha			240
Monterrey Airport - Conflict with ownership of certain land
Disclosure of contingent liabilities [line items]
Area of land in claim	107,639	96

Financial risk management - Cat

Financial risk management - Categories of financial instruments and risk management policies (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial risk management
Taxes payable other than income tax	$ 220,524	$ 262,772	$ 158,589
Trade accounts payable
Financial risk management
Employee statutory profit-sharing payable			9,491
Credit and interest rate | Cash and cash equivalents and other investments held to maturity
Financial risk management
Financial Assets	2,382,345	3,005,792	2,665,641
Credit and exchange rate | Receivables, net
Financial risk management
Financial Assets	630,757	714,130	390,785
Interest rate, exchange rate and liquidity | Short-term and long-term debt
Financial risk management
Financial Liabilities	4,644,387	4,707,303	4,729,388
Liquidity | Trade accounts payable
Financial risk management
Financial Liabilities	249,507	252,831	243,867
Employee statutory profit-sharing payable	6,475	9,242
Liquidity | Accrued expenses
Financial risk management
Financial Liabilities	69,125	43,254	42,425
Liquidity | Accounts payable to related parties
Financial risk management
Financial Liabilities	$ 130,022	$ 140,328	$ 67,521

Financial risk management - Int

Financial risk management - Interest rate risk management (Details) - MXN ($) $ in Thousands	Dec. 31, 2017	Dec. 28, 2017	Jan. 03, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial risk management
Outstanding long-term debt	$ 4,644,387			$ 4,707,303	$ 4,729,388
Interest rate risk
Financial risk management
Outstanding long-term debt	$ 4,644,387			$ 4,707,303	$ 4,729,388
Percent of long-term debt with fixed interest rate (as a percent)				95.60%
Interest rate (as a percent)				4.40%
Interest rate risk | Three-month LIBOR | Top of range
Financial risk management
Interest rate (as a percent)			0.99872%
Interest rate risk | Three-month LIBOR | Bottom of range
Financial risk management
Interest rate (as a percent)		1.69465%
Interest rate risk | Fixed interest rate
Financial risk management
Percent of long-term debt with fixed interest rate (as a percent)	96.90%				95.10%
Interest rate (as a percent)	3.10%				4.90%

Financial risk management - Sen

Financial risk management - Sensitivity analysis for interest rates (Details) $ in Thousands	Dec. 31, 2017MXN ($)$ / shares	Dec. 31, 2016MXN ($)$ / shares	Dec. 31, 2015MXN ($)$ / shares
Financial risk management
Accrued interest	$ 144,387	$ 207,303	$ 229,388
U.S. Dollar
Financial risk management
Exchange rate | $ / shares	19.7354	20.664	17.3398
Three-month LIBOR
Financial risk management
Hypothetical unfavorable change in interest rate (as a percent)	10.00%	10.00%	10.00%
Hypothetical increase in financing expense through unfavorable change in debt variable interest rates	$ 244	$ 166	$ 74

Financial risk management - Exc

Financial risk management - Exchange risk management (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial risk management
Percent of revenue (excluding construction revenue) from TUA of international passengers (as a percent)	15.88%	15.57%	15.27%
Appreciation rate of the peso to U.S. Dollar (as a percent)	10.00%	10.00%	10.00%
Projected decrease in revenue due to appreciation rate of peso to U.S. dollar	$ 92,154	$ 81,052	$ 63,283
Depreciation of peso to U.S. Dollar (as a percent)	4.49%

Financial risk management - For

Financial risk management - Foreign currency sensitivity analysis (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / shares$ / $	Dec. 31, 2016USD ($)$ / shares$ / $	Dec. 31, 2015USD ($)$ / shares$ / $	Apr. 30, 2018$ / shares	Dec. 31, 2017MXN ($)$ / shares$ / $	Dec. 31, 2016MXN ($)$ / shares$ / $	Dec. 31, 2015MXN ($)$ / shares$ / $
Financial risk management
Liability positions net in foreign currencies	$ 25,370
Carrying values of monetary assets and liabilities denominated in foreign currencies
Liabilities denominated in foreign currencies	(353,248)				$ (6,971,485)	$ (6,858,343)	$ (6,559,809)
Assets per segment	$ 719,560				$ 14,200,800	$ 13,545,323	$ 12,510,336
U.S. Dollar
Interbank exchange rate
Exchange rate | $ / shares	19.7354	20.664	17.3398		19.7354	20.664	17.3398
Currency risk
Financial risk management
Unfavorable change in exchange rate of peso against U.S. dollar (as a percent)	10.00%	10.00%	10.00%		10.00%	10.00%	10.00%
Liability positions net in foreign currencies		$ 2,407	$ 14,220
Estimated exchange rate (gain) loss from unfavorable change in exchange rate					$ (50,069)	$ 4,974	$ 24,657
Transactions in U.S. dollars
Technical assistance	$ 6,863	5,707	5,641
Insurance	2,295	1,481	2,651
Purchase of machinery and maintenance	16,562	6,886	7,506
Software	1,722	1,728	1,095
Professional services, fees and subscriptions	968	1,161	607
Other	6,437	7,660	5,387
Currency risk | U.S. Dollar
Carrying values of monetary assets and liabilities denominated in foreign currencies
Liabilities denominated in foreign currencies	(15,631)	(14,457)	(14,389)
Assets per segment	$ 41,001	$ 12,050	$ 169
Interbank exchange rate
Exchange rate	19.7354	20.6640	17.3398	18.8644	19.7354	20.6640	17.3398

Financial risk management - Cre

Financial risk management - Credit risk (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017MXN ($)item	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Financial risk management
Number of credit options | item	3
30 days	30 days
45 days	45 days
60 days	60 days
Allowance for doubtful accounts | $	$ 38,223	$ 67,482	$ 67,733

Financial risk management - Liq

Financial risk management - Liquidity risk (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)$ / shares	Dec. 31, 2017MXN ($)$ / shares	Dec. 31, 2016MXN ($)$ / shares	Dec. 31, 2015MXN ($)$ / shares
Financial risk management
Outstanding long-term debt		$ 4,644,387	$ 4,707,303	$ 4,729,388
Interest		144,387	207,303	229,388
Accrued expenses		145,123	183,175	171,046
Total liabilities	$ 353,248	$ 6,971,485	$ 6,858,343	$ 6,559,809
U.S. Dollar
Financial risk management
Exchange rate | $ / shares	19.7354	19.7354	20.664	17.3398
Liquidity
Financial risk management
Outstanding long-term debt		$ 4,644,387	$ 4,707,303	$ 4,729,388
Interest		1,235,772	1,548,995	1,859,373
Trade accounts payable		249,507	252,831	243,867
Accrued expenses		69,125	43,254	42,425
Accounts payable with related parties		130,022	140,328	67,521
Total liabilities		$ 6,328,813	$ 6,692,711	$ 6,942,574
Liquidity | U.S. Dollar
Financial risk management
Exchange rate | $ / shares	19.7354	19.7354	20.6640	17.3398
Liquidity | 2018
Financial risk management
Outstanding long-term debt		$ 50,852	$ 56,122	$ 55,433
Interest		310,710	313,145	312,296
Trade accounts payable		249,507	252,831	243,867
Accrued expenses		69,125	43,254	42,425
Accounts payable with related parties		130,022	140,328	67,521
Total liabilities		810,216	805,680	721,542
Liquidity | 2018 - 2020
Financial risk management
Outstanding long-term debt		3,093,535	137,166	128,337
Interest		806,984	929,050	931,603
Total liabilities		3,900,519	1,066,216	1,059,940
Liquidity | 2021 - 2023
Financial risk management
Outstanding long-term debt		1,500,000	3,014,015	3,045,618
Interest		118,078	287,120	595,794
Total liabilities		$ 1,618,078	3,301,135	3,641,412
Liquidity | 2024 and subsequently
Financial risk management
Outstanding long-term debt			1,500,000	1,500,000
Interest			19,680	19,680
Total liabilities			$ 1,519,680	$ 1,519,680

Financial risk management - Fin

Financial risk management - Financial instruments at fair value (Details) - MXN ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial Instruments at fair value
Total long-term debt	$ 4,644,387	$ 4,707,303	$ 4,729,388
Fair Value
Financial Instruments at fair value
Total long-term debt	4,465,684	4,489,119	4,655,234
Book Value
Financial Instruments at fair value
Total long-term debt	4,644,387	4,707,303	4,729,388
Level 1 | Fair Value
Financial Instruments at fair value
Total long-term debt	4,246,875	4,204,695	4,384,607
Level 2 | Fair Value
Financial Instruments at fair value
Total long-term debt	$ 218,809	$ 284,424	$ 270,627

Shareholders' equity - Subscrib

Shareholders' equity - Subscribed and paid-in capital (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)shares	Dec. 31, 2017MXN ($)shares	May 31, 2017shares	Dec. 31, 2016MXN ($)shares	Dec. 31, 2015MXN ($)shares	Dec. 31, 2014shares
Disclosure of classes of share capital [line items]
Number of Shares, held in treasury	(324,507)	(324,507)
Number of Shares, outstanding	393,446,466	393,446,466		393,770,973	392,156,377	395,379,850
Contributed Capital	$ 15,373	$ 303,394		$ 303,644	$ 302,398
Series B Class I
Disclosure of classes of share capital [line items]
Number of Shares, outstanding	344,004,973	344,004,973		350,234,000	350,234,000
Contributed Capital | $		$ 265,269		$ 270,071	$ 270,071
Series BB Class I
Disclosure of classes of share capital [line items]
Number of Shares, outstanding	49,766,000	49,766,000		49,766,000	49,766,000
Contributed Capital | $		$ 38,375		$ 38,375	$ 38,375
Treasury Series B Class I
Disclosure of classes of share capital [line items]
Number of Shares, held in treasury	(324,507)	(324,507)	(6,229,027)	(6,229,027)	(7,843,623)
Contributed Capital | $		$ (250)		$ (4,802)	$ (6,048)

Shareholders' equity - Shares r

Shareholders' equity - Shares repurchased (Details) - MXN ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	May 31, 2017
Shares repurchased
Issuance of shares, net (in shares)		1,614,596
Issuance of shares		$ (184,370)
Number of Shares, held in treasury	324,507
Shares repurchased (in shares)	324,507		3,223,473
Purchase of treasury shares	$ 34,234	$ 184,370	$ 244,293
Market price per share	$ 101.67	$ 89.38	$ 83.61
Treasury shares held	$ 34,234
Treasury shares held (in shares)	324,507
Treasury Series B Class I
Shares repurchased
Number of Shares, held in treasury	324,507	6,229,027	7,843,623	6,229,027
Treasury shares held (in shares)	324,507	6,229,027	7,843,623	6,229,027

Shareholders' equity - Addition

Shareholders' equity - Additional Equity Activity (Details) $ / shares in Units, $ in Thousands	May 16, 2017MXN ($)	Apr. 28, 2017MXN ($)$ / shares	Apr. 29, 2016MXN ($)	Apr. 14, 2016MXN ($)$ / shares	Apr. 23, 2015MXN ($)$ / shares	Dec. 31, 2017USD ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)$ / shares	Dec. 31, 2017MXN ($)
Dividends
Dividends approved		$ 1,600,000,000		$ 1,400,000,000
Dividends per share | $ / shares		$ 4		$ 3.50
Dividends paid	$ 1,575,083		$ 1,371,641,000
Period during which tax on dividend distributions and interim payments can be credited against income tax						2 years
Equity reserves
Reserve for repurchase of shares		$ 1,500,000,000		$ 1,200,000,000	$ 241,543,000	$ 74,284	$ 1,383,124,000	$ 1,041,000	$ 1,466,016,000
Transfer to capital redemption reserve									116,876,000
Increase (decrease) in the legal reserve fund					17,704,000		$ 176,530,000
Percentage of annual net profits required to be reserved to legal reserve fund						5.00%
Percentage of share capital stock at par value required to be maintained in legal reserve fund						20.00%	20.00%
Legal reserve fund not available for distribution							$ 61,689	238,219	$ 61,689
Change in fixed portion of capital stock
Approved decrease in fixed portion of capital stock					$ 1,200,000,000			$ 1,200,000,000
Reduction of issued capital per share | $ / shares					$ 3			$ 3
Amount reimbursed to shareholders								$ 1,184,834,000
Amount of approved decrease in fixed portion of capital stock pertaining to treasury stock held								$ 15,166,000

Accumulated other comprehens108

Accumulated other comprehensive loss (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Accumulated other comprehensive loss
Balance, Pre-tax		$ (11,480)	$ (15,013)	$ (13,727)
Movements of the year, Pre-tax	$ (213)	(4,199)	3,533	(1,286)
Balance, Pre-tax		(15,679)	(11,480)	(15,013)
Balance, Tax		3,428	4,488	4,102
Movements of the year, Tax	64	1,260	(1,060)	386
Balance, Tax		4,688	3,428	4,488
Balance, Net of tax		(8,052)	(10,525)	(9,625)
Movements of the year, Net of tax		(2,939)	2,473	(900)
Balance, Net of tax	$ (557)	$ (10,991)	$ (8,052)	$ (10,525)

Other income (Details)

Other income (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Other income
(Gain) loss on sale of property and equipment	$ (68)	$ (1,340)	$ (22,250)	$ (140)
Insurance recovery		(40)		(6,790)
Total	$ (70)	$ (1,380)	$ (22,250)	$ (6,930)

Related party balances and t110

Related party balances and transactions (Details) $ in Thousands, $ in Thousands	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Related party balances and transactions
Repayments for constructions to related parties	$ 4,967	$ 98,017	$ 46,032	$ 1,110
Accounts payable to related parties	$ 6,588	130,022	140,328	67,521
ICA Constructora de Infraestructura, S.A. de C.V.
Related party balances and transactions
Repayments for constructions to related parties		44,254
Accounts payable to related parties		783
ICA Constructora, S.A. de C.V.
Related party balances and transactions
Repayments for constructions to related parties		44,264
Ingenieros Civiles Asociados
Related party balances and transactions
Repayments for constructions to related parties			37,866	1,110
Empresas ICA, S.A.B. de C.V. “EMICA”
Related party balances and transactions
Accounts payable to related parties			18,763	10,558
Servicios de Tecnologia Aeroportuaria, S.A. de C.V. “SETA”
Related party balances and transactions
Accounts payable to related parties		82,501	74,266	41,287
Nacional Hispana Hoteles, S. de R. L. de C. V.
Related party balances and transactions
Accounts payable to related parties			5,316	14,559
Operadora Nacional Hispana, S.A. de C.V.
Related party balances and transactions
Accounts payable to related parties		7,985	6,110
VCD Construccion y Desarrollo, S.A.P.I. de C.V.
Related party balances and transactions
Repayments for constructions to related parties		3,612	8,166
Accounts payable to related parties		4,773	26,325
ICA Ingenieria S. A. de C. V.
Related party balances and transactions
Accounts payable to related parties		367	7,155
Actica Sistemas, S. de R.L. de C.V.
Related party balances and transactions
Repayments for constructions to related parties		5,887
Accounts payable to related parties		1,496	1,760
Grupo ICA, S.A. de C.V.
Related party balances and transactions
Accounts payable to related parties		16,592
GGA Capital, S.A.P.I. de C.V.
Related party balances and transactions
Accounts payable to related parties		14,700
Grupo Hotelero Santa Fe, S. A. de C. V.
Related party balances and transactions
Accounts payable to related parties		$ 825	$ 633	$ 1,117

Related party balances and t111

Related party balances and transactions – Principal transactions (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2017MXN ($)
Related party balances and transactions
Intangible assets other than goodwill	$ 387,548		$ 6,513,514	$ 6,348,605	$ 7,648,417
Technical assistance fee related party transactions	6,844	$ 135,074	117,987	97,818
Administrative expenses	29,790	587,917	642,345	558,222
Major maintenance provision	14,747	291,038	262,871	174,293
Interest income	$ 6,450	127,290	199,600	80,740
Related parties
Related party balances and transactions
Technical assistance fee related party transactions		135,074	117,987	97,818
Administrative expenses		66,783	51,950	22,061
Related parties | SAP
Related party balances and transactions
Capital Investment				10,706
Related parties | Hotel
Related party balances and transactions
Capital Investment			340
Related parties | Industrial warehouse
Related party balances and transactions
Capital Investment		46,172	103,235	29,067
Related parties | Platform
Related party balances and transactions
Major maintenance provision		10,405		3,162
Iimprovements to concessioned assets.			$ 21,694
Related parties | Runway
Related party balances and transactions
Major maintenance provision				$ 29,089
Related parties | Terminal
Related party balances and transactions
Iimprovements to concessioned assets.		$ 210,098

Related party balances and t112

Related party balances and transactions - Short-term promissory note (Details) $ in Thousands	Dec. 31, 2015item	Jun. 14, 2015	May 13, 2015USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016USD ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015USD ($)	Dec. 31, 2015MXN ($)
Disclosure of transactions between related parties [line items]
Short-term employee benefits					$ 70,413		$ 74,706		$ 75,487
Number of members | item	3
Servicios de Tecnologia Aeroportuaria, S.A. de C.V. “SETA”
Disclosure of transactions between related parties [line items]
Technical assistance annual consideration			$ 3,478,000
Percentage of ebitda before payment of technical assistance fee for first three years			4.00%
Percentage of ebitda before payment of technical assistance fee for next two years			3.00%
Ebitda before payment of technical assistance fee, period one			3 years
Ebitda before payment of technical assistance fee, period two			2 years
Increase in variable consideration than fixed technical assistance fee				$ 3,517,000		$ 3,478,000		$ 3,482,000
Threshold percentage of shares held by related party to trigger conversion of shares		7.65%
Minimum percentage of shares held by related party to not trigger conversion of shares		7.65%
Percentage of shares to be held in waiting period one		51.00%
Waiting period		7 years
The remaining percentage of shares to be held in waiting period two		49.00%
The waiting period to hold percentage of shares two		3 years
Estimated portion of fifty one percent of shares		0.125%
The waiting period to hold percentage of shares three		5 years
Threshold percentage of equity stake above which related party can sell shares		51.00%
Directors and officers
Disclosure of transactions between related parties [line items]
Remuneration					15,283		15,030		14,725
Chairman
Disclosure of transactions between related parties [line items]
Remuneration					$ 5,251		$ 4,970		$ 4,675
CONOISA
Disclosure of transactions between related parties [line items]
Ownership interest held	74.50%
ADPM
Disclosure of transactions between related parties [line items]
Ownership interest held	25.50%
Percentage of shareholding exchanged	25.50%
Partner ownership interest	4.30%
Empresas ICA
Disclosure of transactions between related parties [line items]
Percentage of shareholding exchanged	100.00%
Partner ownership interest	12.60%
Ownership interest indirectly held	1.90%

Operating segment data (Details

Operating segment data (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)	Dec. 31, 2017MXN ($)
Disclosure of operating segments [line items]
Aeronautical revenues	$ 220,266	$ 4,347,031	$ 3,872,735	$ 3,033,130
Non-aeronautical revenues	73,793	1,456,338	1,332,762	1,111,541
Construction services revenues	67,212	1,326,458	344,772	347,988
Depreciation and amortization	15,161	299,205	276,634	238,809
Major maintenance provision	14,747	291,038	262,871	174,293
Allowance for doubtful accounts		(10,561)	749	(1,103)
Operating income	164,128	3,239,119	2,783,554	2,036,555
Interest expense	17,878	352,822	330,694	334,764
Interest income	(6,450)	(127,290)	(199,600)	(80,740)
Income tax	41,199	813,073	746,782	512,110
Assets per segment	719,560		13,545,323	12,510,336	$ 14,200,800
Liabilities per segment	353,248		6,858,343	6,559,809	6,971,485
Capital investments			529,393	548,346	1,581,959
Investment in airport concessions	$ 387,548		6,513,514	6,348,605	7,648,417
Operating segments
Disclosure of operating segments [line items]
Aeronautical revenues		4,362,489	3,887,358	3,047,098
Non-aeronautical revenues		5,303,815	6,060,296	4,647,184
Construction services revenues		1,337,418	353,339	347,988
Depreciation and amortization		299,205	276,634	238,809
Major maintenance provision		291,038	268,016	174,293
Allowance for doubtful accounts		(10,561)	749	(1,103)
Operating income		4,500,865	3,894,146	2,643,749
Interest expense		402,969	365,273	374,949
Interest income		(177,437)	(234,179)	(120,990)
Income tax		813,073	746,782	511,874
Assets per segment			25,146,912	22,863,645	26,836,067
Liabilities per segment			7,572,653	7,589,822	8,475,300
Capital investments			537,960	548,346	1,590,151
Investment in airport concessions			6,510,746	6,348,605	7,656,609
Operating segments | Monterrey
Disclosure of operating segments [line items]
Aeronautical revenues		2,046,097	1,799,823	1,443,311
Non-aeronautical revenues		547,586	560,016	484,111
Construction services revenues		367,214	97,631	70,999
Depreciation and amortization		84,132	76,016	76,353
Major maintenance provision		72,284	64,794	24,327
Allowance for doubtful accounts		(4,263)	(1,417)	293
Operating income		518,737	473,916	365,471
Interest expense		7,975	1,136	4,044
Interest income		(24,111)	(39,945)	(11,285)
Income tax		100,978	119,677	91,560
Assets per segment			4,868,188	4,501,117	4,993,403
Liabilities per segment			658,768	626,259	826,644
Capital investments			98,585	73,221	505,445
Investment in airport concessions			2,492,242	2,464,006	2,785,385
Operating segments | Acapulco
Disclosure of operating segments [line items]
Aeronautical revenues		158,448	149,214	138,309
Non-aeronautical revenues		34,089	30,446	27,864
Construction services revenues		372,253	76,772	81,869
Depreciation and amortization		20,105	19,466	18,737
Major maintenance provision		8,475	2,934	21,621
Allowance for doubtful accounts		(1,443)	(521)	(133)
Operating income		38,531	39,461	21,329
Interest expense		4,764	411	832
Interest income		(4,845)	(13,246)	(7,663)
Income tax		(648)	5,197	1,582
Assets per segment			1,085,908	1,044,502	1,197,164
Liabilities per segment			113,528	113,932	282,120
Capital investments			77,069	84,354	372,253
Investment in airport concessions			641,082	587,517	996,944
Operating segments | Mazatlan
Disclosure of operating segments [line items]
Aeronautical revenues		249,479	221,522	168,703
Non-aeronautical revenues		47,819	46,879	40,820
Construction services revenues		30,205	19,527	41,487
Depreciation and amortization		15,815	15,458	14,487
Major maintenance provision		16,913	12,490	(4,949)
Allowance for doubtful accounts		(168)	(196)	(576)
Operating income		59,470	55,052	40,170
Interest expense		4,259	428	5,283
Interest income		(20,699)	(27,820)	(16,671)
Income tax		15,213	14,978	10,389
Assets per segment			1,021,766	934,612	1,128,244
Liabilities per segment			128,287	100,921	150,567
Capital investments			19,632	43,502	30,223
Investment in airport concessions			492,692	487,516	508,123
Operating segments | Zihuatanejo
Disclosure of operating segments [line items]
Aeronautical revenues		167,550	141,091	118,736
Non-aeronautical revenues		27,334	26,280	23,751
Construction services revenues		28,039	25,699	57,943
Depreciation and amortization		17,347	16,680	15,073
Major maintenance provision		20,566	17,170	(73)
Allowance for doubtful accounts		(445)	85	(203)
Operating income		38,977	35,945	27,338
Interest expense		9,886	932	2,731
Interest income		(7,494)	(7,736)	(284)
Income tax		4,367	5,705	3,844
Assets per segment			596,541	605,538	596,780
Liabilities per segment			114,706	148,768	116,609
Capital investments			25,822	60,483	28,138
Investment in airport concessions			507,683	496,394	520,632
Operating segments | Chihuahua
Disclosure of operating segments [line items]
Aeronautical revenues		308,746	272,921	196,033
Non-aeronautical revenues		52,742	48,374	40,204
Construction services revenues		122,412	16,061	3,769
Depreciation and amortization		12,682	11,853	12,025
Major maintenance provision		18,446	28,066	30,246
Allowance for doubtful accounts		(4)	(1,011)	934
Operating income		72,298	64,258	26,553
Interest expense		12,251	2,102	(1,888)
Interest income		(21,242)	(23,510)	(11,847)
Income tax		17,271	20,277	8,991
Assets per segment			793,881	721,935	903,724
Liabilities per segment			170,004	159,632	213,533
Capital investments			16,202	3,933	122,448
Investment in airport concessions			349,021	342,739	460,816
Operating segments | Culiacan
Disclosure of operating segments [line items]
Aeronautical revenues		409,399	351,096	255,921
Non-aeronautical revenues		53,296	48,280	39,981
Construction services revenues		43,362	9,608	34,058
Depreciation and amortization		16,147	16,006	15,899
Major maintenance provision		10,368	11,251	23,338
Allowance for doubtful accounts		(1,159)	764	(102)
Operating income		92,556	79,875	40,763
Interest expense		7,637	383	12,319
Interest income		(7,940)	(8,017)	(1,911)
Income tax		20,847	20,524	8,843
Assets per segment			726,063	683,797	816,623
Liabilities per segment			117,342	141,263	126,234
Capital investments			9,896	35,579	44,389
Investment in airport concessions			479,351	487,393	508,523
Operating segments | Durango
Disclosure of operating segments [line items]
Aeronautical revenues		100,884	98,550	63,186
Non-aeronautical revenues		11,061	11,026	9,080
Construction services revenues		19,974	4,381	2,992
Depreciation and amortization		6,140	5,965	5,867
Major maintenance provision		18,130	14,649	23,868
Allowance for doubtful accounts		282	(286)	392
Operating income		22,389	19,017	10,991
Interest expense		6,712		(6,799)
Interest income		(8,174)	(5,739)	(259)
Income tax		954	4,200	3,513
Assets per segment			290,258	281,816	292,704
Liabilities per segment			58,281	64,356	67,734
Capital investments			4,478	4,948	19,991
Investment in airport concessions			155,540	155,568	170,869
Operating segments | San Luis Potosi
Disclosure of operating segments [line items]
Aeronautical revenues		149,823	130,337	99,341
Non-aeronautical revenues		24,603	23,666	20,482
Construction services revenues		108,756	24,456	4,668
Depreciation and amortization		7,934	7,105	7,431
Major maintenance provision		29,556	28,384	(16,415)
Allowance for doubtful accounts		(1,275)	711	757
Operating income		29,078	30,801	22,686
Interest expense		4,791		1,859
Interest income		(8,272)	(13,166)	(437)
Income tax		7,570	11,286	7,575
Assets per segment			293,618	287,251	449,272
Liabilities per segment			89,123	117,833	232,186
Capital investments			24,553	4,760	108,756
Investment in airport concessions			214,064	195,097	316,361
Operating segments | Tampico
Disclosure of operating segments [line items]
Aeronautical revenues		171,550	162,389	144,178
Non-aeronautical revenues		25,859	22,735	22,810
Construction services revenues		46,740	32,053	9,589
Depreciation and amortization		7,697	6,567	6,655
Major maintenance provision		14,583	10,782	21,551
Allowance for doubtful accounts		(1,627)	1,907	(2,146)
Operating income		39,483	37,025	32,793
Interest expense		2,674		4,361
Interest income		(3,441)	(3,016)	(1,389)
Income tax		8,418	10,685	2,284
Assets per segment			306,466	276,428	316,409
Liabilities per segment			90,438	84,117	83,646
Capital investments			32,157	9,691	46,740
Investment in airport concessions			214,318	187,509	254,622
Operating segments | Torreon
Disclosure of operating segments [line items]
Aeronautical revenues		156,158	151,251	110,480
Non-aeronautical revenues		22,478	20,087	18,191
Construction services revenues		20,018	5,722	14,796
Depreciation and amortization		8,726	8,515	8,484
Major maintenance provision		19,361	16,916	1,431
Allowance for doubtful accounts		(59)	186	(339)
Operating income		35,743	34,268	25,065
Interest expense		8,382	9	(3,238)
Interest income		(9,902)	(8,265)	(1,120)
Income tax		7,019	10,537	7,392
Assets per segment			372,001	361,616	371,887
Liabilities per segment			90,046	111,837	111,569
Capital investments			5,834	14,849	20,018
Investment in airport concessions			251,932	253,471	264,450
Operating segments | Zacatecas
Disclosure of operating segments [line items]
Aeronautical revenues		95,153	87,616	66,957
Non-aeronautical revenues		12,172	10,120	9,304
Construction services revenues		19,175	7,677	10,294
Depreciation and amortization		6,815	6,656	6,719
Major maintenance provision		19,843	17,315	10,768
Allowance for doubtful accounts		46	(2)	(1,193)
Operating income		19,354	19,547	11,601
Interest expense		3,487	150	(2,559)
Interest income		(4,465)	(8,396)	(439)
Income tax		3,495	6,891	3,433
Assets per segment			286,407	279,613	276,803
Liabilities per segment			74,939	89,086	90,328
Capital investments			7,789	10,488	19,175
Investment in airport concessions			195,325	193,119	208,814
Operating segments | Ciudad Juarez
Disclosure of operating segments [line items]
Aeronautical revenues		244,891	208,042	146,201
Non-aeronautical revenues		40,676	34,351	29,225
Construction services revenues		31,917	9,905	9,512
Depreciation and amortization		11,103	10,334	10,658
Major maintenance provision		31,042	24,025	29,265
Allowance for doubtful accounts		(95)	507	775
Operating income		57,113	48,478	28,593
Interest expense		4,441	147	1,240
Interest income		(10,987)	(12,530)	(1,195)
Income tax		13,507	14,819	7,890
Assets per segment			452,024	424,666	480,320
Liabilities per segment			111,710	94,148	124,745
Capital investments			10,005	11,391	33,404
Investment in airport concessions			334,050	333,676	355,659
Operating segments | Reynosa
Disclosure of operating segments [line items]
Aeronautical revenues		104,311	113,506	95,742
Non-aeronautical revenues		15,094	14,150	12,557
Construction services revenues		127,353	23,847	6,012
Depreciation and amortization		6,616	6,290	6,127
Major maintenance provision		11,471	19,240	9,315
Allowance for doubtful accounts		(362)	212	(278)
Operating income		23,881	25,539	14,373
Interest expense			179	(954)
Interest income		1,313	(7,364)	(284)
Income tax		2,819	7,923	3,144
Assets per segment			282,249	263,490	440,857
Liabilities per segment			67,237	73,408	208,144
Capital investments			23,944	6,384	127,353
Investment in airport concessions			183,446	164,600	305,411
Operating segments | NH T2 Hotel
Disclosure of operating segments [line items]
Non-aeronautical revenues		250,777	227,884	212,488
Depreciation and amortization		20,799	20,739	20,506
Allowance for doubtful accounts			240
Operating income		75,797	68,595	60,142
Interest expense		5,537	11,497	14,536
Interest income		(876)	(639)	(595)
Income tax		15,454	15,505	14,830
Assets per segment			290,685	311,178	289,844
Liabilities per segment			85,543	149,555	32,374
Capital investments			2,095	1,605	1,338
Operating segments | Hilton Garden Inn
Disclosure of operating segments [line items]
Non-aeronautical revenues		90,875	83,625	16,882
Depreciation and amortization		10,111	9,268	1,163
Allowance for doubtful accounts		54
Operating income		25,680	22,222	(984)
Interest expense		2,329	2,171	369
Interest income		(3,857)	(986)	(583)
Income tax		3,753	4,244	(634)
Assets per segment			234,123	212,412	250,264
Liabilities per segment			15,996	10,984	8,857
Capital investments			13,410	95,078	9,090
Operating segments | VYNMSA
Disclosure of operating segments [line items]
Non-aeronautical revenues		12,914	4,952
Depreciation and amortization		9,200	3,416
Operating income		(1,767)	(3,063)
Interest expense		373
Interest income		(2,034)	(238)
Income tax		(3,053)	(1,315)
Assets per segment			194,209		242,220
Liabilities per segment			32,577		43,260
Capital investments			104,326		70,726
Operating segments | Other
Disclosure of operating segments [line items]
Non-aeronautical revenues		4,034,440	4,847,425	3,639,434
Depreciation and amortization		37,836	36,300	12,625
Allowance for doubtful accounts		(43)	(430)	716
Operating income		3,353,545	2,843,210	1,916,865
Interest expense		317,471	345,728	342,813
Interest income		(40,411)	(53,566)	(65,028)
Income tax		595,109	475,649	337,238
Assets per segment			13,052,525	11,673,674	13,789,549
Liabilities per segment			5,554,128	5,503,723	5,756,750
Capital investments			62,163	88,080	30,664
Eliminations
Disclosure of operating segments [line items]
Aeronautical revenues		(15,458)	(14,623)	(13,968)
Non-aeronautical revenues		(3,847,477)	(4,727,534)	(3,535,643)
Construction services revenues		(10,960)	(8,567)
Major maintenance provision			(5,145)
Operating income		(1,261,746)	(1,110,592)	(607,194)
Interest expense		(50,147)	(34,579)	(40,185)
Interest income		$ 50,147	34,579	40,250
Income tax				236
Assets per segment			(11,601,589)	(10,353,309)	(12,635,267)
Liabilities per segment			(714,310)	$ (1,030,013)	(1,503,815)
Capital investments			(8,567)		(8,192)
Investment in airport concessions			$ 2,768		$ (8,192)

Revenues (Details)

Revenues (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017item	Dec. 31, 2017itemlb	Dec. 31, 2017itemkg	Dec. 31, 2017item	Dec. 31, 2017USD ($)item	Dec. 31, 2017MXN ($)item	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Revenue [abstract]
Time period that maximum rates for airport concessions are established	5 years
Number of passengers that a work load unit is equivalent to | item	1	1	1	1	1	1
Weight of cargo that a work load unit is equivalent to		220	100
Aeronautical services:
Domestic TUA						$ 2,801,751	$ 2,477,711	$ 1,863,875
International TUA						921,539	810,519	632,834
Landing charges						178,638	167,298	150,739
Platform for embarking and disembarking						119,123	118,004	107,465
Aircraft parking charges on extended stay or overnight						31,923	33,242	30,284
Domestic and international passenger and carry-on baggage check						48,762	37,925	36,433
Aerocars and jetways						44,234	40,715	38,983
Other airport services, leases and regulated access rights						201,061	187,321	172,517
Total revenues from aeronautical services					$ 220,266	4,347,031	3,872,735	3,033,130
Commercial activities
Car parking charges						200,948	192,063	181,631
Advertising						106,045	120,591	115,579
Retail operations						106,908	97,631	75,975
Food and beverage						101,577	85,995	67,187
Car rental operators						92,770	75,966	60,168
Time share developers						13,193	13,967	12,283
Financial services						7,418	6,457	5,930
Communication and services						13,604	10,362	13,120
Services to passengers						2,662	2,803	2,669
VIP lounges						20,453	16,937	10,119
Loyalty program							911	1,772
Other services						31,420	26,787	23,421
Total revenue from commercial activities						696,998	650,470	569,854
Diversification activities:
Hotel services						340,279	311,679	229,352
OMA Carga						152,963	132,211	107,443
Real estate services						12,328	12,988	10,966
Industrial services						14,647	4,952
Other services						4,405	5,852	2,088
Total diversification activities						524,622	467,682	349,849
Complementary activities:
Leasing of space						73,575	67,784	69,376
Access rights						16,538	13,984	11,156
Documented baggage inspection						132,262	121,400	99,974
Other services (CUSS and CUTE)						12,343	11,442	11,332
Total of complimentary activities						234,718	214,610	191,838
Total revenue from non-aeronautical services					$ 73,793	1,456,338	1,332,762	1,111,541
Incentives given to airlines						$ 62,048	$ 11,759	$ 245,553
Percentage of revenues generated by the Monterrery, Acapulco, Mazatlan, Culiacan, Chihuahua, Ciudad Juarez and Zihuatanejo airports				82.00%			75.00%	77.00%

Cost of services (Details)

Cost of services (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cost of services
Wages and salaries	$ 219,890	$ 203,912	$ 191,660
Maintenance	184,246	157,740	147,923
Security and insurance	176,197	167,678	153,011
Utilities (electric, cleaning and water)	189,238	158,956	135,825
Building lease	45,181	41,031	38,265
Allowance for doubtful accounts	(10,561)	749	(1,103)
Cost of hotel service	65,034	58,607	42,742
Employee statutory profit sharing	1,568	2,121	2,411
Equipment lease, fees and others	110,272	109,347	125,399
Cost of services	$ 981,065	$ 900,141	$ 836,133