Grupo Aeroportuario del Sureste, S. A. B. de C. V. (ASR) 6-K ASUR Announces Total Passenger Traffic for December 2023

Exhibit 99.1

Contacts:      ASUR Lic. Adolfo Castro +52-55-5284-0408 acastro@asur.com.mx InspIR Group Susan Borinelli +1-646-330-5907 susan@inspirgroup.com

ASUR Announces Total Passenger Traffic for December 2023

Passenger traffic increased year-on-year by 4.5% in Mexico and 11.2% in Puerto Rico

and decreased 10.8% in Colombia

Mexico City, January 4, 2024 - Grupo Aeroportuario del Sureste, S.A.B. de C.V. (NYSE: ASR; BMV: ASUR), ASUR, a leading international airport group with operations in Mexico, the U.S. and Colombia, today announced that passenger traffic for December 2023 reached a total of 6.5 million passengers, representing an increase of 1.8% compared to December 2022.

Passenger traffic presented year-on-year increases of 4.5% in Mexico, 11.2% in Puerto Rico, while it decreased 10.8% in Colombia. Passenger traffic growth in Mexico and Puerto Rico was driven primarily by increases in international traffic of 9.6% and 27.2%, respectively, while domestic traffic decreased 1.1% in Mexico and increased 9.6% in Puerto Rico. Passenger traffic in Colombia remained negatively affected by the suspension of operations of two local airlines in the beginning of 2023 which resulted in an 14.2% decline in domestic traffic while international traffic increased 4.0% year-on-year.

This announcement reflects comparisons between the periods December 1 through December 31, 2023 and 2022. Transit and general aviation passengers are excluded from traffic measures in Mexico and Colombia.

Passenger Traffic Summary

	December				% Chg			Year to date				% Chg
	2022		2023					2022		2023
Mexico		3,863,469		4,035,410		4.5			39,523,958		43,467,984		10.0
Domestic Traffic		1,860,661		1,840,849		(1.1	)		18,700,737		21,272,863		13.8
International Traffic		2,002,808		2,194,561		9.6			20,823,221		22,195,121		6.6
San Juan, Puerto Rico		997,444		1,109,409		11.2			10,310,990		12,197,553		18.3
Domestic Traffic		907,519		995,024		9.6			9,404,031		10,919,299		16.1
International Traffic		89,925		114,385		27.2			906,959		1,278,254		40.9
Colombia		1,559,866		1,390,788		(10.8	)		16,506,196		14,895,709		(9.8	)
Domestic Traffic		1,270,380		1,089,695		(14.2	)		13,718,590		11,920,378		(13.1	)
International Traffic		289,486		301,093		4.0			2,787,606		2,975,331		6.7
Total Traffic		6,420,779		6,535,607		1.8			66,341,144		70,561,246		6.4
Domestic Traffic		4,038,560		3,925,568		(2.8	)		41,823,358		44,112,540		5.5
International Traffic		2,382,219		2,610,039		9.6			24,517,786		26,448,706		7.9

ASUR Page 1 of 3

Mexico Passenger Traffic

		December				% Chg			Year to date				% Chg
		2022		2023					2022		2023
Domestic Traffic			1,860,661		1,840,849		(1.1	)		18,700,737		21,272,863		13.8
CUN	Cancun		1,050,521		961,582		(8.5	)		10,705,897		11,842,217		10.6
CZM	Cozumel		10,557		23,595		123.5			173,506		203,999		17.6
HUX	Huatulco		78,694		62,396		(20.7	)		878,959		796,414		(9.4	)
MID	Merida		301,884		313,486		3.8			2,811,644		3,350,258		19.2
MTT	Minatitlan		9,113		13,166		44.5			100,754		134,392		33.4
OAX	Oaxaca		121,516		137,469		13.1			1,111,877		1,477,600		32.9
TAP	Tapachula		48,752		57,355		17.6			489,547		537,472		9.8
VER	Veracruz		119,522		138,490		15.9			1,241,734		1,562,819		25.9
VSA	Villahermosa		120,102		133,310		11.0			1,186,819		1,367,692		15.2
International Traffic			2,002,808		2,194,561		9.6			20,823,221		22,195,121		6.6
CUN	Cancun		1,884,068		2,059,633		9.3			19,637,064		20,908,196		6.5
CZM	Cozumel		49,642		52,160		5.1			489,764		473,504		(3.3	)
HUX	Huatulco		14,923		20,025		34.2			92,076		118,300		28.5
MID	Merida		25,709		30,028		16.8			267,974		323,845		20.8
MTT	Minatitlan		661		593		(10.3	)		11,264		7,726		(31.4	)
OAX	Oaxaca		16,298		17,948		10.1			192,157		215,442		12.1
TAP	Tapachula		1,179		874		(25.9	)		13,707		16,272		18.7
VER	Veracruz		7,449		10,790		44.9			91,844		102,875		12.0
VSA	Villahermosa		2,879		2,510		(12.8	)		27,371		28,961		5.8
Traffic Total Mexico			3,863,469		4,035,410		4.5			39,523,958		43,467,984		10.0
CUN	Cancun		2,934,589		3,021,215		3.0			30,342,961		32,750,413		7.9
CZM	Cozumel		60,199		75,755		25.8			663,270		677,503		2.1
HUX	Huatulco		93,617		82,421		(12.0	)		971,035		914,714		(5.8	)
MID	Merida		327,593		343,514		4.9			3,079,618		3,674,103		19.3
MTT	Minatitlan		9,774		13,759		40.8			112,018		142,118		26.9
OAX	Oaxaca		137,814		155,417		12.8			1,304,034		1,693,042		29.8
TAP	Tapachula		49,931		58,229		16.6			503,254		553,744		10.0
VER	Veracruz		126,971		149,280		17.6			1,333,578		1,665,694		24.9
VSA	Villahermosa		122,981		135,820		10.4			1,214,190		1,396,653		15.0

US Passenger Traffic, San Juan Airport (LMM)
	December				% Chg		Year to date				% Chg
	2022		2023				2022		2023
SJU Total		997,444		1,109,409		11.2		10,310,990		12,197,553		18.3
Domestic Traffic		907,519		995,024		9.6		9,404,031		10,919,299		16.1
International Traffic		89,925		114,385		27.2		906,959		1,278,254		40.9

Colombia Passenger Traffic Airplan
		December				% Chg			Year to date				% Chg
		2022		2023					2022		2023
Domestic Traffic			1,270,380		1,089,695		(14.2	)		13,718,590		11,920,378		(13.1	)
MDE	Rionegro		950,281		788,658		(17.0	)		10,185,489		8,804,497		(13.6	)
EOH	Medellin		116,101		119,559		3.0			1,264,382		1,242,806		(1.7	)
MTR	Monteria		140,909		128,769		(8.6	)		1,569,389		1,288,100		(17.9	)
APO	Carepa		20,370		16,801		(17.5	)		263,093		205,052		(22.1	)
UIB	Quibdo		39,328		32,387		(17.6	)		379,948		353,504		(7.0	)
CZU	Corozal		3,391		3,521		3.8			56,289		26,419		(53.1	)
International Traffic			289,486		301,093		4.0			2,787,606		2,975,331		6.7
MDE	Rionegro		289,486		301,093		4.0			2,787,606		2,975,331		6.7
EOH	Medellin
MTR	Monteria		—		—					—		—
APO	Carepa		—		—					—		—
UIB	Quibdo		—		—					—		—
CZU	Corozal		—		—					—		—
Traffic Total Colombia			1,559,866		1,390,788		(10.8	)		16,506,196		14,895,709		(9.8	)
MDE	Rionegro		1,239,767		1,089,751		(12.1	)		12,973,095		11,779,828		(9.2	)
EOH	Medellin		116,101		119,559		3.0			1,264,382		1,242,806		(1.7	)
MTR	Monteria		140,909		128,769		(8.6	)		1,569,389		1,288,100		(17.9	)
APO	Carepa		20,370		16,801		(17.5	)		263,093		205,052		(22.1	)
UIB	Quibdo		39,328		32,387		(17.6	)		379,948		353,504		(7.0	)
CZU	Corozal		3,391		3,521		3.8			56,289		26,419		(53.1	)

ASUR Page 2 of 3

About ASUR

Grupo Aeroportuario del Sureste, S.A.B. de C.V. (ASUR) is a leading international airport operator with a portfolio of concessions to operate, maintain and develop 16 airports in the Americas. This comprises nine airports in southeast Mexico, including Cancun Airport, the most important tourist destination in Mexico, the Caribbean and Latin America, and six airports in northern Colombia, including Medellin international airport (Rio Negro), the second busiest in Colombia. ASUR is also a 60% JV partner in Aerostar Airport Holdings, LLC, operator of the Luis Muñoz Marín International Airport serving the capital of Puerto Rico, San Juan. San Juan’s Airport is the island’s primary gateway for international and mainland-US destinations and was the first, and currently the only major airport in the US to have successfully completed a public–private partnership under the FAA Pilot Program. Headquartered in Mexico, ASUR is listed both on the Mexican Bolsa, where it trades under the symbol ASUR, and on the NYSE in the U.S., where it trades under the symbol ASR. One ADS represents ten (10) series B shares. For more information, visit www.asur.com.mx.

- END -

ASUR Page 3 of 3