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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K10-K/A

Amendment No.1

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For the fiscal year ended December 31, 2021

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Commission File Number 001-40217

Sun Country Airlines Holdings, Inc.

(Exact name of registrant as specified in its charter)

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Registrant’s telephone number, including area code: (651) 681-3900

Securities registered pursuant to Section 12(b) of the Act:

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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No þ

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes ☐ No þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes þ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No þ

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant as of June 30, 2021 was approximately $861 million.

Number of shares outstanding by each class of common stock, as of December 31, 2021:

Common Stock, $0.01 par value – 57,872,452 shares outstanding

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DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement relating to the 2022 Annual Meeting of Stockholders are incorporated herein by references in Part III of this Annual Report on Form 10-K to the extent stated herein. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2021.

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“KOA” means Kona International Airport.

“LAX” means Los Angeles International Airport.

“LCC” means low-cost carrier and includes JetBlue Airways and Southwest Airlines.

“Load factor” means the percentage of aircraft seat miles actually occupied on a flight (RPMs divided by ASMs) for scheduled service.

“Mainline U.S. passenger airlines” includes us, Alaska Airlines, Allegiant Travel Company, American Airlines, Delta Air Lines, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines and United Airlines.

“MSP” means Minneapolis – St. Paul International Airport.

“NMB” means the National Mediation Board.

“On-Time Arrival” means percentage of scheduled flights that arrived at their scheduled time.

“OTAs” means online travel agents.

“Passengers” means the total number of passengers flown on all flight segments.

“PSP2” and “PSP3” relates to the Coronavirus Aid, Relief, and Economic Security (CARES) Act-Payroll Support Program.

“Revenue passenger miles” or “RPMs” means the number of miles flown by passengers.

“RLA” means the United States Railway Labor Act.

“Scheduled service” means transportation of passengers on flights we operate in and out of airports on a schedule of routes and flight times we provide for general sale.

“Scheduled service revenue” consists of base fares, unused and expired passenger credits and other expired travel credits for scheduled service.

“SeMS” means Security Management System.

“SMS” means Safety Management System.

“SCV” means Sun Country Vacations.

“TRA” means the Tax Receivable Agreement with pre-IPO stockholders.

“TRASM” or “unit revenue” means total revenue divided by total ASMs. Scheduled TRASM includes scheduled, ancillary and other revenue divided by scheduled ASMs while charter includes charter revenue divided by charter ASMs. Starting in 2020, we exclude cargo revenue from total revenue as the freighters we operate under the ATSA do not contribute to our ASMs.

“Treasury” means the United States Department of the Treasury.

“TSA” means the United States Transportation Security Administration.

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“TWU” means the Transport Workers Union, the union representing our dispatchers.

“ULCC” means ultra low-cost carrier and includes Allegiant Travel Company, Frontier Airlines and Spirit Airlines.

“VFR” means visiting friends and relatives.

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report contains “forward-looking statements” within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, which involve risks and uncertainties. These forward-looking statements are generally identified by the use of forward-looking terminology, including the terms “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “likely,” “may,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and, in each case, their negative or other various or comparable terminology. All statements other than statements of historical facts contained in this Annual Report, including statements regarding our strategy, future operations, future financial position, future revenue, projected costs, prospects, plans, objectives of management, and expected market growth are forward-looking statements. The forward-looking statements are contained principally in the sections entitled “Business,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and include, among other things, statements relating to:

These statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance, or achievements to be materially different from any future results, performance, or achievements expressed or implied by the forward-looking statements. Important factors that could cause our results to vary from expectations include, but are not limited to:

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These forward-looking statements are based on assumptions and subject to risks and uncertainties. Given these uncertainties, undue reliance should not be placed on these forward-looking statements. Except as required by law, we undertake no obligation to update or review publicly any forward-looking statements, whether as a result of new information, future events or otherwise. We anticipate that subsequent events and developments will cause our views to change. This Annual Report and the documents filed as exhibits hereto should be read completely and with the understanding that our actual future results may be materially different from what we expect. Our forward-looking statements do not reflect the potential impact of any future acquisitions, merger, dispositions, joint ventures, or investments we may undertake. We qualify all of our forward-looking statements by these cautionary statements.

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SUMMARY OF PRINCIPAL RISK FACTORS

The following is a summary of the principal risks that could adversely affect, or have adversely affected, the Company’s business, operating results and financial condition. These risks are more fully described in Part I, Item 1A of this Annual Report.

Risks Related to Our Industry

Risks Related to Our Business

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Risks Related to Our Indebtedness

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Risks Related to Ownership of Our Common Stock

Unless otherwise indicated or the context otherwise requires, all dollars are stated in thousands.

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PART I

Item 1.Business

Overview

Sun Country Airlines is a new breed of hybrid low-cost air carrier that dynamically deploys shared resources across our synergistic scheduled service, charter, and cargo businesses. By doing so, we believe we are able to generate high growth, high margins and strong cash flows with greater resilience than other passenger airlines. We focus on serving leisure and VFR passengers and charter customers and providing CMI service to Amazon, with flights throughout the United States and to destinations in Canada, Mexico, Central America and the Caribbean. Based in Minnesota, we operate an agile network that includes our scheduled service business and our synergistic charter and cargo businesses. We share resources, such as flight crews, across our scheduled service, charter and cargo business lines with the objective of generating higher returns and margins and mitigating the seasonality of our route network. We optimize capacity allocation by market, time of year, day of week and line of business by shifting flying to markets during periods of peak demand and away from markets during periods of low demand with far greater frequency than nearly all other large U.S. passenger airlines. We believe our flexible business model generates higher returns and margins while also providing greater resiliency to economic and industry downturns than a traditional scheduled service carrier.

Our Unique Business Model

Scheduled Service. Our scheduled service business combines low costs with a high quality product to generate higher TRASM than ULCCs while maintaining lower Adjusted CASM than LCCs, resulting in best-in-class unit profitability. Our scheduled service business includes many cost characteristics of ultra low-cost carriers, or ULCCs (which include Allegiant Travel Company, Frontier Airlines and Spirit Airlines), such as an unbundled product (which means we offer a base fare and allow customers to purchase ancillary products and services for an additional fee), and point-to-point service. We fly a single-family fleet of Boeing 737-NG aircraft, which allows us to maintain a cost base comparable to these ULCCs. However, we offer a high quality product that we believe is superior to ULCCs and consistent with that of low-cost carriers, or LCCs (which include Southwest Airlines and JetBlue Airways). Our product includes generous legroom, complimentary beverages, in-flight entertainment, and in-seat power. The combination of our agile peak demand network with our elevated consumer product allows us to generate higher TRASM than ULCCs while maintaining lower Adjusted CASM than LCCs. In addition, as a low cost, leisure focused carrier, rather than a business travel focused carrier, we believe we are one of the early beneficiaries of the industry rebound following the COVID-19 pandemic.

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Charter. Our charter business, which is one of the largest narrow body charter operations in the United States, is a key component of our strategy both because it provides inherent diversification and downside demand protection (it is uncorrelated to our scheduled service, as evidenced by the fact that it recovered faster than our scheduled service business during the COVID-19 pandemic) as well as because it is synergistic with our other businesses (for example, we can dynamically deploy aircraft and pilots to their most profitable uses whether they are in charter or scheduled service). Our charter business has several favorable characteristics, including large repeat customers, more stable demand than scheduled service flying and the ability to pass through certain costs, including fuel. Our diverse charter customer base includes casino operators, the U.S. Department of Defense, college sports teams and professional sports teams. In October 2021, we signed a five-year agreement to provide charter service to all Major League Soccer (MLS) teams. Major League Soccer features 28 clubs throughout the United States and Canada, in addition to a future expansion team in St. Louis, MO. We are the leading charter airline for college sports including the National Collegiate Athletic Association (“NCAA”) Championships (notably “March Madness”) as well as individual team travel. Additionally, we signed a new five-year agreement, effective March 2022 to provide charter service to Caesars Entertainment, Inc. This agreement restarts a relationship between the two organizations that ended in late 2020. The agreement calls for two aircraft to provide charter service for Caesars Entertainment guests to Atlantic City, New Jersey, Reno, Nevada, Laughlin, Nevada and Gulfport, Mississippi. Our charter business includes ad hoc, repeat, short-term and long-term service contracts with pass-through fuel arrangements and annual rate escalations. Most of our business is non-cyclical because the U.S. Department of Defense and sports teams still fly during normal economic downturns, and our casino contracts are long-term in nature.

Our charter business has proven to be more resilient than our scheduled service business during the COVID-19 induced downturn. Additionally, our charter business complements our seasonal and day-of-week focused scheduled passenger service by allowing us to optimally schedule our aircraft and crews to the most profitable flying opportunities. In general, charter ASMs are highest in fall months when scheduled service operations are less favorable. In addition, certain costs may be passed directly to the customer. Fuel expense is typically incurred by us; however, revenue rates under our charter contracts are often adjusted for final fuel prices incurred, effectively shifting fuel price risk away from us.

Cargo. On December 13, 2019, we signed the ATSA with Amazon to provide air cargo services. Flying under the ATSA began in May 2020 and, as of December 31, 2021, we are flying 12 Boeing 737-800 cargo aircraft for Amazon (having been awarded two additional aircraft in October and November 2020 after the initial contract for 10 aircraft). Our CMI service is asset-light from a Sun Country perspective, as Amazon supplies the aircraft and covers many of the operating expenses, including fuel, and provides all cargo loading and unloading services. We are responsible for flying the aircraft under our air carrier certificate, crew, aircraft line maintenance and insurance, all of which allow us to leverage our existing operational expertise from our scheduled service and charter businesses. The ATSA has generated consistent, positive cash flows through the COVID-19 induced downturn. The ATSA offers potential future growth opportunities by establishing a long-term partnership with Amazon. Our cargo business also enables us to leverage certain assets, capabilities and fixed costs to enhance profitability and promote growth across our company. For example, we believe that by deploying pilots across each of our business lines, we increase the efficiency of our operations.

The ATSA is a six-year contract and includes two, two-year extensions exercisable at Amazon’s option, providing for a total term of ten years if both extension options are exercised. The option to renew the ATSA for two additional two-year terms is at Amazon’s sole discretion, subject to Amazon providing Sun Country with at least 180 days’ prior written notice before the expiration of the then-current term. The ATSA has annual rate escalations, so rate increases occurred on December 13, 2021 and 2020.

Our Transformation

In April 2018, Sun Country Airlines was acquired by the Apollo Funds. Since the acquisition, our business has been transformed under a new management team of seasoned professionals who have a strong combination of low-cost and legacy network airline experience.

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While the COVID-19 induced industry downturn impeded our growth in 2020 and 2021, we believe that these investments have positioned us to profitably grow our business in the long term.

Initial Public Offering

On March 19, 2021, we completed our initial public offering, in which we issued and sold 10,454,545 shares of our common stock at a public offering price of $24.00 per share. We received net proceeds of $225,329 from sales of shares in the initial public offering, after deducting underwriting discounts and commissions, and other offering expenses. We used $46,260 of the net proceeds from the initial public offering to repay all amounts outstanding under the CARES Act Loan. The remaining net proceeds were used for general corporate purposes, including to acquire additional aircraft.

COVID-19 Induced Downturn

All major U.S. passenger airlines were negatively impacted by the declining demand environment resulting from the COVID-19 pandemic. We have also experienced a significant decline in demand related to the COVID-19 pandemic, which has caused a material decline in our revenues and negatively impacted our financial condition and operating results, which is likely to continue for the duration of the COVID-19 pandemic, and our business operations were adjusted in response to the pandemic as described below. However, we believe that our diversified and flexible business model allowed us to mitigate the impact of COVID-19 on our business in 2020 and 2021 better than any other mainline U.S. passenger airline (which we consider to be the 11 largest U.S. mainline passenger carriers based on ASMs) based on adjusted pre-tax and adjusted operating income margins. We believe this result was due to our flexible business model, allowing us to shift resources to our charter and cargo businesses and away from our scheduled service business during periods of low leisure passenger demand. Other airlines have different business models than ours, and a comparison of pre-tax and operating income margins among airlines during normal industry conditions may have a different result.

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Actions we took during 2020 to mitigate the impact of the COVID-19 induced downturn preserved more than $152,074 in liquidity and included: capacity reductions; a company-wide hiring freeze; headcount reductions; voluntary leave programs; reduced advertising expenditures; reduced capital expenditures; and deferred vendor payments. In February 2021, we executed a five-year credit agreement with a group of lenders that provides for a $25,000 Revolving Credit Facility and a $90,000 Delayed Draw Term Loan Facility (collectively, the “Credit Facilities”). Further, we have received grants from Treasury through the Payroll Support Program and accepted the CARES Act Loan from the Treasury through the CARES Act Loan Program, which was repaid in full on March 24, 2021, without issuing any warrants, unlike nearly all other carriers with whom we compete that received government assistance. We have also maintained our pre-COVID-19 corporate credit ratings throughout this downturn. COVID-19 vaccines have become widely available in the United States and a majority of the U.S. population is fully vaccinated according to the CDC. As vaccines became more widely distributed in 2021, the airline industry continued to rebound in 2021 and we believe will normalize in 2022. Given our focus on low-cost domestic leisure travel, we believe we are rebounding faster than most other U.S. airlines.

Our financial and operating results and business operations for our scheduled service and charter businesses for the years ended December 31, 2020 and 2021 were materially and adversely impacted as a result of the COVID-19 pandemic, which impact is likely to continue during the duration of the COVID-19 pandemic. We believe that our financial and operating results for the year ended December 31, 2019 are more useful indicators of our scheduled service and charter service operating performance during normal industry conditions. See “Risk Factors.”

Our Competitive Strengths

We believe that the following key strengths allow us to compete successfully within the U.S. airline industry.

Diversified and Resilient Business Model. Our diversified business model, which includes a focus on leisure and VFR passengers, charter and e-commerce related cargo service, is unique in the airline sector and mitigates the impact of economic and industry downturns on our business when compared with other large U.S. passenger airlines. Our charter business has rebounded quicker than our scheduled service business as customers such as the DoD and large university sports teams continued to fly in 2020 and 2021, while our casino customers are subject to long-term contracts and began flying again in June 2020. Our cargo business exhibited steady growth in 2020 and 2021 as flying ramped up and demand remained strong, driven by underlying secular growth in e-commerce.

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Agile Peak Demand Scheduling Strategy. We flex our capacity by day of the week, month of the year and line of business to capture what we believe are the most profitable flying opportunities available from both our MSP home market and our network of non-MSP markets. As a result, our route network varies widely throughout the year. For the year ended December 31, 2019, the most recent normalized full year before the COVID-19 pandemic, we flew approximately 38% of our ASMs during our top 100 peak demand days of the year as compared to 15% of our ASMs during our bottom 100 demand days of the year. For 2019, our average fare was approximately 29% higher on our top 100 peak demand days as compared to the remaining days of the year. In 2019, only 3% of our routes were daily year-round, compared to 67% for Southwest Airlines, 42% for Spirit Airlines, 8% for Frontier Airlines and 2% for Allegiant Travel Company. Our agile peak demand strategy allows us to generate higher TRASM by focusing on days with stronger demand. Our flexible network has also benefitted us in 2020 and 2021 during the COVID-19 induced industry downturn where we have been able to quickly shift capacity from low demand markets to high demand markets within the United States as COVID-19 infection rates shifted across regions of the country. Our flying continued to be more seasonal in 2021 with our scheduled service from July 2021 through April 2022 containing only 1% daily year-round routes. The following charts demonstrate that our schedule is highly variable by day of the week and month of the year.

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In addition to shifting aircraft across our network by season and day of week, we also shift aircraft between our scheduled service and charter businesses to maximize the return on our assets. We regularly schedule our fleet using what we refer to as “Power Patterns,” which involves scheduling aircraft and crew on trips that combine scheduled service and charter legs, dynamically replacing what would be lower margin scheduled service flights with charter opportunities. Our agility is supported by our variable cost structure and the cross utilization of our people and assets between our lines of business. Our synergies from cross utilization have increased since we began providing CMI services because our pilots are interchangeably deployed between scheduled service, charter and cargo flights. For example, when demand in our scheduled service business declined in 2020 as a result of the COVID-19 induced industry downturn, we allocated more pilot flying hours to our charter and cargo businesses.

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Tactical Mid-Life Fleet with Flexible Operations. We maintain low aircraft ownership costs by acquiring mid-life Boeing 737-800 aircraft, which have lower acquisition costs when compared to new Boeing 737 aircraft, that more than offsets their higher ongoing maintenance and repair costs. Lower ownership costs allow us to maintain lower unit costs at lower levels of utilization. This allows us to concentrate our flying during periods of peak demand, which generates higher TRASM and also allows us to park aircraft during periods of low demand, at a lower cost than other airlines. In 2019, we flew our aircraft an average of 9.6 hours per day, which is the lowest among major U.S. airlines, other than Allegiant Travel Company, which operates a similar low utilization model but serves smaller markets. In addition to the benefits of lower all-in ownership costs, we do not have an aircraft order book because we only purchase mid-life aircraft. As a result, unlike many other airlines, we are not locked into large future capital expenditures. Rather, we have the ability to opportunistically take advantage of aircraft prices with purchases at the time of our choosing. Our single family aircraft fleet also has operational and cost advantages, such as allowing for optimization of crew scheduling and training and lower maintenance costs. Our fleet is highly reliable, and we have a demonstrated ability to maintain our high completion factor during harsh weather conditions. For the year ended December 31, 2019, we had a completion factor of 99.8% across our system. We improved this already leading completion factor to 99.9% in both 2020 and 2021.

Superior Low-Cost Product and Brand. We have invested in numerous projects to create a well-regarded product and brand that we believe is superior to ULCCs while maintaining lower fares than LCCs and larger full service carriers. Some of the reasons that we believe we have a superior brand to ULCCs include:

Competitive Low Cost Structure. Our CASM declined from 10.09 cents for the year ended December 31, 2017 to 8.82 cents for the year ended December 31, 2019. Our Adjusted CASM declined from 7.80 cents for the year ended December 31, 2017 to 6.31 cents for the year ended December 31, 2019. Our completed and ongoing cost savings efforts include conversion to a focus on owning (versus leasing) aircraft, renegotiation of our component maintenance agreement, fuel savings initiatives, catering cost reductions, renegotiation of distribution contracts, consolidation of staff at headquarters on airport property and various other initiatives. Our CASM and Adjusted CASM for the year ended December 31, 2020 of 8.91 cents and 7.57 cents and for the year ended December 31, 2021 of 8.86 cents and 6.44 cents, respectively, were adversely impacted due to the COVID-19 pandemic. While Adjusted CASM for all U.S. airlines increased in 2020 as a result of the COVID-19 induced downturn, we believe that our business model and strategy positions us well to maintain and improve our Adjusted CASM in the future, while maintaining lower utilization rates than many other U.S. passenger airlines.

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Strong Position in Our Profitable MSP Home Market. We have been based in the Minneapolis-St. Paul area since our founding over 35 years ago, where our brand is well-known and well-liked. We are the largest low-cost carrier operating at MSP, which is our largest base, and the second largest airline at MSP after Delta Air Lines.  Throughout the COVID-19 pandemic we have been focused on developing our network at MSP and have grown our nonstop destinations from MSP by over 40% since 2019.  Moreover, we have seen our share of MSP-origin customers improving through the COVID pandemic.  We fly out of Terminal 2, which we believe is preferred by many flyers because of its smaller layout, shorter security wait times, close parking relative to check-in and full suite of retail shops. As of December 31, 2021, we utilized 8 of the 14 gates in Terminal 2. As a result of our focus on flying during seasonal peak periods, our well regarded brand and product and our strong position in Minneapolis, we have historically enjoyed a TRASM premium to other leisure airlines at MSP.

Seasoned Management Team. Our Chief Executive Officer, Jude Bricker, joined Sun Country Airlines in July 2017 and has over 17 years of experience in the aviation industry, including serving as the Chief Operating Officer of Allegiant Travel Company from 2016 to 2017. Our President and Chief Financial Officer, Dave Davis, joined Sun Country in April 2018 and has over 23 years of experience in the aviation industry, including previously serving as the Chief Financial Officer at Northwest Airlines and US Airways. Other members of our management team have worked at airlines such as Alaska Airlines, American Airlines, Delta Air Lines, Northwest Airlines, United Airlines and US Airways.

Our Growth Strategy

Since 2018, we have established the infrastructure to support our significant long-term profitable growth strategy.

We believe our initiatives have provided us with a platform to profitably grow our business. Key elements of our growth strategy include:

Leverage the Expected Rebound in Our Passenger Business. The number of domestic LCC and ULCC passenger enplanements grew at a compound annual growth rate of 7% from 2014 to 2019 due to long-term increasing demand for air travel in the United States. Following the spread of COVID-19 in the United States, passenger levels declined. Our scheduled service business is rebounding as the COVID-19 pandemic matures, particularly with the uptake of vaccines. We believe we are among the early beneficiaries of this rebound given our peak demand strategy and focus on leisure and VFR travelers, who are gradually returning to pre-COVID-19 levels. In previous economic downturns, leisure and VFR travelers have also been the first to return to flying at normalized levels.

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Grow Our Cargo Business. In December 2019, we signed the ATSA with Amazon to provide air cargo transportation services flying 10 aircraft with agreed upon pricing. Since that time, Amazon requested, and we agreed to fly, two additional aircraft to bring the total number of aircraft we are flying for Amazon to 12 as of December 31, 2021. We believe we are well-positioned to continue growing our cargo business over time, while continuing to operate for Amazon and potentially new customers.

Expand our Peak Demand Flying in Minneapolis and Beyond. Following a rebound in U.S. air travel, we intend to continue growing our network profitably both from MSP and on new routes outside of MSP by focusing on seasonal markets and day-of-the-week flying during periods of peak demand. We expanded our network from 46 routes in 2017 to 98 as of the end of 2019, including expanding our routes that neither originate nor terminate in MSP from 5 routes in 2017 to 42 as of the end of 2019. At the end of 2020 and 2021, we flew 114 and 127 network routes, respectively. These 2020 and 2021 network routes included 31 and 30 routes, respectively, that neither originated nor terminated in MSP. We have identified a significant number of additional new market opportunities, both in MSP and outside of MSP, that we expect to be profitable and allow us to grow our agile, peak-demand focused scheduled service network strategy. We have a successful history of opening and closing stations quickly to meet seasonal demand, which we believe will benefit us in re-opening markets we closed during the COVID-19 downturn and in pursuing new market growth opportunities quickly. Our future network plans include growing our network at our hub in Minneapolis to full potential, including adding frequencies on routes we already serve and adding new routes to leverage our large, loyal customer base in the area. Our long-term strategic plans have identified growth opportunities at MSP that we believe represent significant scheduled service capacity growth opportunities.

We had also been rapidly growing outside of MSP prior to the COVID-19 pandemic, and we expect to do so again once the air travel market rebounds. Our customer-friendly low fares have been well received in the upper Midwest and in large, fragmented markets elsewhere that we can profitably serve on a seasonal and/or day-of-week basis. Our upper Midwest growth is focused on cold to warm weather leisure routes from markets similar to Minneapolis, such as Madison, Wisconsin. Additionally, we have added capacity on large leisure trunk routes on a seasonal basis during periods when demand is high. Examples of such routes include Los Angeles to Honolulu and Texas to Mexican beach destinations during the summer months. Our business model is ideally suited to seasonally serve these routes, which are highly profitable in normal environments because fares are elevated during the months in which we fly them. Our long-term strategic plans have identified non-MSP growth opportunities that we believe represent approximately 60% of our scheduled service capacity growth opportunities.

Continue to Increase Our Margins and Free Cash Flow. From December 31, 2017 through December 31, 2019, we reduced our CASM from 10.09 cents to 8.82 cents and our Adjusted CASM from 7.80 cents to 6.31 cents, a level comparable to ULCCs. For 2020, our CASM was 8.91 cents, compared to 8.86 cents in 2021 and Adjusted CASM was 7.57 cents for 2020 and 6.44 cents for 2021, respectively. When combined with our TRASM, which remains comparable to LCCs and higher than ULCCs, we generate highly competitive margins. Our period of investment in fleet renewal and transformative capital expenditures is largely behind us, and our focus has been on growth. We intend to continue to improve our leading margin and free cash flow profile through a variety of initiatives and measures. Key initiatives include further conversion to an owned (versus leased) model for aircraft ownership, leveraging our fixed cost base as we continue to grow our passenger aircraft fleet to achieve economies of scale, continuous optimization of our maintenance operations and completion of other ongoing strategic initiatives. As a result, we expect improvements in profit margins and free cash flow, which we define as operating cash flow minus non-aircraft capital expenditures, following a rebound in the U.S. air travel market to support growth in the years ahead.

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Our Scheduled Service Business

We provide low-fare passenger airline service primarily to leisure and VFR travelers. Our low fares are designed to stimulate demand from price-sensitive travelers seeking a superior product to ULCCs. For the years ended December 31, 2021, 2020 and 2019, our number of scheduled service passengers were approximately 2.7 million, 1.7 million and 3.6 million, respectively. For the years ended December 31, 2021, 2020 and 2019, our average base fare was approximately $102.21, $114.96 and $111.08, respectively. Passengers and fares were both impacted dramatically by the COVID-19 pandemic in the years ended December 31, 2021 and 2020. We believe that the year ended December 31, 2019 is a more useful indicator of our average base fare and passenger statistics during normal industry conditions.

In addition to base fares, passengers can choose from a number of ancillary products for an additional cost. Sources of our ancillary revenue include baggage fees, seat selection fees, priority check-in and boarding fees, itinerary service fees, on-board sales and sales of trip insurance. Part of our strategy has been to reduce base fares to stimulate demand while increasing ancillary revenue per passenger, which we believe offers passengers more choice and correspondingly, more ancillary revenue. Our on-board sales are also designed to enhance the customer experience, including local passenger favorite brands of beer, wine and spirits. For the years ended December 31, 2021, 2020 and 2019, our average ancillary revenue per passenger was approximately $42.89, $40.53, and $33.14, respectively. Overall ancillary revenues in 2021 and 2020 were impacted by the COVID-19 pandemic, which drove a decline in the number of passengers, and during which we ceased on-board sales, among other actions to reduce the spread of the virus.

We also earn revenue from our Sun Country Vacations products, including commissions from the sale of third-party hotel rooms and rental cars. Our SCV products facilitate booking a flight and land package at a discounted price for our customers. We offer vacation products to promote “one stop shopping.” In 2019, our bookings for SCV were temporarily reduced in connection with a delay in the functionality for these services during the transition to our new booking system. Our other revenue also includes revenue from the transportation of mail and our co-branded credit card. During 2020, revenue from these other items decreased substantially as a result of the COVID-19 pandemic, and we saw some recovery in 2021. Despite this, we continued to enhance functionality in our booking system and we believe that we are well-positioned to capture SCV and other revenue opportunities when the COVID-19 pandemic recedes.

We also offer interline connectivity with international and domestic airlines. In mid-2019, prior to our transition to Navitaire, we offered interline connectivity with seven carriers. We have reestablished interline connectivity in our Navitaire booking system and have identified additional opportunities to grow our interline connectivity.

Route Network

Our network strategy is optimized between four key segments: MSP, non-MSP, charter services and cargo services. As Minnesota’s hometown airline, a substantial portion of our business is serving markets originating or ending in MSP. Our MSP network served approximately 52 markets in 2019. In 2020 and 2021, we served 83 and 97 markets from MSP, respectively, in spite of the COVID-19 downturn. We believe that our TRASM in our MSP network for the year ended December 31, 2019 was higher than any ULCC in its hub. We have a leading position at Terminal 2 in MSP, which is preferred by many flyers because of its smaller layout, shorter security wait times, close parking relative to check-in and full suite of retail shops. We are the largest low-cost airline at MSP, with significant opportunity to continue to grow both seat share and destinations.

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Non-MSP service is an increasingly significant portion of our business, having grown from eight non-MSP markets in 2017 to 30 in 2021. During the COVID-19 pandemic, non-MSP growth plans were slowed. We expect to continue to identify large demand markets where other airlines have been unable to respond to market needs during periods of seasonal demand. We have a successful history of opening and closing stations to meet seasonal demand. Since the start of 2019, we have launched 83 new markets, 31 of which we have subsequently closed. As part of the on-going assessment of market opportunities, we continue to identify future growth opportunities, primarily from Midwest locations to warm weather leisure destinations and large markets with fragmented and seasonal demand peaks.

Landline offers convenient airport shuttle service for Sun Country passengers to the Minneapolis-St. Paul airport from five locations throughout Minnesota and two locations in Wisconsin.

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Below are maps of the routes we operated in 2017 and 2021 (including routes we operate on a seasonal basis):

2017 Scheduled Service Route Map

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2021 Scheduled Service Route Map

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Our charter business is a core and integral piece of our network strategy that leverages our highly flexible operating certificate and flexible labor force to serve markets worldwide. In the future, we expect to continue to grow our charter service capacity. Our charter and scheduled service businesses complement each other as our integrated scheduling allows the most profitable use of the aircraft, either scheduled or charter, to be selected on a segment by segment basis. Aircraft and crew utilization can be maximized by filling in charter flying in periods when scheduled service flying is less profitable.

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Our air carrier operating certificate, labor agreements and operating capabilities allow us to fly to numerous destinations worldwide, which we believe is a benefit to our charter service. We have identified several growth opportunities across potential sports teams and leagues, third party charter brokers, VIP individuals, government, and leisure contracts. For example, we started regularly scheduled VIP charter service between LAX and KOA (Hawaii) with an all first-class configuration. Additionally, we have longstanding relationships with our charter customers who continue to rely on us as their trusted charter provider.

Our cargo service performed under the ATSA serves destinations on Amazon’s network. To the extent we can optimize flight crew on freighters with overlapping scheduled or charter service, we attempt to capture those synergies as well, though they are not core to that line of business. However, like the charter and scheduled service business, aircraft and crew utilization can be maximized by filling in cargo service in periods when scheduled service flying is less profitable.

Competition

The airline industry is highly competitive. The principal competitive factors in the airline industry are ticket prices, flight schedules, aircraft type, passenger amenities, customer service, reputation and frequent flyer programs. We have different competitive sets in our scheduled service business, charter business and cargo business.

Our competitors and potential competitors in the scheduled service business include both legacy network airlines and low-cost airlines. Our key competitors on domestic routes include Alaska Airlines, Allegiant Travel Company, American Airlines, Delta Air Lines, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines and United Airlines. Our charter business competitors include charter-only operators Swift/iAero Airways, as well as other scheduled passenger carriers who also operate charter flying, such as Delta Air Lines.

The principal competitors for our cargo business include ATSG and Southern Air. Our on-time arrival performance for our cargo business since starting operations in May 2020, together with our operational capabilities, give us a stable position with our customer, Amazon.

Our principal competitive advantages are our diversified and resilient business model, our agile peak demand scheduling strategy, our tactical mid-life fleet with flexible operations, our superior low-cost product and brand, our competitive low-cost structure, our strong position in our profitable MSP home market and our seasoned management team. We also believe the association of our brand with a high level of operational performance differentiates us from our competitors and enables us to generate greater customer loyalty. Our completion factor of 99.8% for the year ended December 31, 2019, the last normalized year before the onset of the COVID-19 pandemic, was higher than any ULCC. We improved this already leading completion factor to 99.9% in both 2020 and 2021.

Our cost initiatives have yielded significant improvements in CASM. As a result of these improvements and our flexibility to serve seasonal and year-round markets, we believe we are better positioned to offer a schedule tailored to properly serve periods of peak demand than our peers. The majority of our competitors maintain higher utilization to keep their unit costs low, which makes it difficult for them to serve markets on a highly seasonal or day-of-week basis. As such, we believe our low Adjusted CASM coupled with relatively low utilization is a competitive advantage.

Our ability to maintain low unit costs at low utilization provides us with a competitive advantage to execute our agile peak demand network planning structure. Our peak demand strategy allows us to move into new markets quickly during periods when demand is maximized and there is less competitive pricing pressure.

See also “Risk Factors—Risks Related to Our Industry—The airline industry is exceedingly competitive, and we compete against LCCS, ULCCs and legacy network airlines; if we are not able to compete successfully in our markets, our business will be materially adversely affected.”

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Seasonality

The airline industry has significant seasonal fluctuation in demand. Our network strategy is designed to take advantage of the seasonal nature of the leisure customer by concentrating our flying in seasons when demand is strongest and flying significantly less in seasons when demand is lower. As a result, our passenger business is subject to significant seasonal fluctuations, especially our scheduled service. While our passenger business will remain highly seasonal, our cargo operations will have the effect of mitigating seasonal troughs. For example, when our scheduled flying demand is lower during the fall and early December, our cargo service remains consistent and grows until Christmas.

Traditionally, our business is geared towards north to south travel from MSP and the upper Midwest in the winter months, our strongest travel season. During the summer months, we focus on VFR traffic from MSP and leisure travelers originating in non-MSP markets. Although our actual results vary by season, we pride ourselves on the ability to adjust our route network and charter service to accommodate seasonality.

Distribution

We sell our scheduled service flights through direct and indirect distribution channels with the goal of selling in the most efficient way across our customer base. Our direct distribution channels include our website and our call center and our indirect distribution channels include third parties, such as travel agents and OTAs (e.g., Priceline and websites owned by Expedia, including Orbitz and Travelocity).

Our direct distribution channels are our lowest cost methods of distributing our product. In addition, they provide more opportunities to sell ancillary products and services, such as baggage services, priority check-in and boarding, and seat selections. With the introduction of our Navitaire-based reservation system and website in June 2019, we have experienced a significant increase in the proportion of our bookings that are sold through direct channels. Sales through direct channels for the years ended December 31, 2021, 2020 and 2019 were 75%, 71% and 62%, respectively.

Indirect distribution channels remain important outlets to sell our flights. Our movement in and out of markets where we may not have an established brand presence, is facilitated by the availability of our inventory through GDS companies (e.g., Amadeus, Sabre and Travelport). We also generate sales through OTAs, which also broadens our ability to sell in highly seasonal markets. Sales through these relatively higher cost indirect channels for the years ended December 31, 2021, 2020 and 2019 were 25%, 29% and 38%, respectively.

We sell our charter services through an internal, dedicated sales team that is focused on long-term relationships with key customers, brokers, organizations, and college and professional sports teams. While our CMI service is presently dedicated to Amazon and governed by the ATSA, we may expand our cargo business by marketing to new potential customers.

Marketing

We are focused on direct-to-consumer marketing targeted at our core leisure and VFR travelers who pay for their own travel costs. Our marketing message is designed to convey our affordable and convenient flight options to leisure destinations. We often include our low base fares in marketing materials in order to stimulate demand.

Our marketing tools are our proprietary email distribution list consisting of over one million email addresses, our Sun Country Rewards program, as well as advertisements online, on television, radio, digital billboards and other channels. Our objective is to use our low prices, quality customer service, and differentiated in-flight product to stimulate demand and drive customer loyalty.

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We have a team of business development professionals who utilize business-to-business methods to identify opportunities and develop and maintain relationships with potential charter customers. We do not presently market our cargo business.

Loyalty Program

Our Sun Country Rewards frequent flyer program rewards and encourages scheduled service customer loyalty and we believe it is well tailored to serving the leisure passenger. Points earned are treated like currency and can be applied towards the purchase of all or a portion of our air travel tickets. This makes our program more valuable to leisure customers who travel less frequently and would have difficultly accumulating enough points to get discounted travel on other airlines. The Sun Country Airlines Visa Signature Card is the primary vehicle whereby customers earn points and our frequent flyer program is geared specifically towards supporting adoption and continued use of the credit card. Sun Country Rewards offers award travel on every flight without blackout dates. Points expire 36 months after the date they were earned, except those points held by Sun Country Visa cardholders do not expire so long as the holder maintains the card as active. Rewards are not available to charter or cargo customers.

Customers

We believe our customers are primarily leisure and VFR travelers who are paying for their own ticket and who make their purchase decision based largely on price. These customers respond well to demand stimulation based on low base fares. Our network is agile and is adjusted for seasonal demand shifts. In the winter months, we largely focus on taking customers to warm weather destinations in the southern United States, Canada, Mexico and the Caribbean. In the other times of the year, we focus on VFR travelers to major markets and also provide service in markets where leisure or price sensitive customer demand is strong.

We believe our product appeals to price-sensitive customers because we give them the choice to pay only for the products and services they want. Overall, our business model is designed to deliver what we believe our customers want: low fares and a high quality flight experience.

We also complement our core business with charter operations. A significant portion of our charter business consists of repeat customers with whom we have long-term relationships, including several large casinos, college and professional sports teams. We have the ability to tailor our schedule to the specific needs of our charter customers, providing reliable operations, high completion factor and reasonable pricing for these customers.

Our cargo business is dedicated to our customer, Amazon. We believe we are well-positioned to continue growing our cargo business over time with Amazon, while continuing to leverage ourselves to Amazon and potentially new customers.

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availability of jet fuel are volatile due to global economic and geopolitical factors as well as domestic and local supply factors. Our historical fuel consumption and costs were as follows:

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Gallons consumed includes scheduled service and charter operations, but does not include cargo. Average price per gallon includes related fuel fees and taxes but excludes fuel-hedging gains and losses.

From time to time, we may enter into fuel derivative contracts in order to mitigate the risk to our business from future volatility in fuel prices, but such contracts may not fully protect us from all related risks. The intention of our fuel hedging program is not to manage earnings, but rather to protect our liquidity. As of December 31, 2021, we had no fuel hedges in place, since the last of them matured in September 2021. Generally speaking, our charter operations and the ATSA have pass-through provisions for fuel costs, and as such we do not hedge our fuel requirements for that portion of our business. Our hedges in place at the end of 2020 consisted of collars and call options, and the underlying commodities consisted of both Gulf Coast Jet Fuel contracts as well as West Texas Intermediate Crude Oil contracts. As of December 31, 2021, we had no outstanding fuel derivative contracts and, at this time, we have no plans to hedge fuel going forward.

Technical Operations: Maintenance, Repairs and Overhaul

We have an FAA mandated and approved maintenance program, which is administered by an experienced group of Technical Operations leaders. All of our technicians are two-licensed Airframe and Powerplant and undergo extensive initial and recurrent training. Aircraft maintenance and repair consists of routine and non-routine maintenance, and work performed is divided into three general categories: line maintenance, heavy maintenance, and component maintenance.

Line maintenance work is handled by our employees and maintenance contractors and consists of work performed between flights or overnight. Performing effective line maintenance is critical in maintaining a reliable operation and represents the majority of and most extensive maintenance we perform. Line maintenance consists of routine daily and weekly scheduled maintenance checks and unplanned maintenance on our aircraft. We maintain Sun Country technicians in Minneapolis, with limited line maintenance capabilities in Gulfport, Mississippi, Dallas-Fort Worth/Alliance Fort Worth, Texas, Lakeland Linder Airport, Florida, and Laughlin/Bullhead International Airport, Arizona. All other line maintenance is provided by third-party maintenance contractors as needed.

Heavy maintenance consists of engine, auxiliary power units, landing gear, and airframe overhauls, which some are quite extensive and can take several months to complete. We maintain an inventory of spare engines to provide for continued operations during engine maintenance events. Airframe heavy maintenance visits consist of a series of complex tasks that generally take from one to six weeks to accomplish and are performed on a set schedule with varying repeat intervals. Due to our relatively small fleet size and projected fleet growth, we believe outsourcing all of our heavy maintenance, engine restoration and major part repair is more economical. On our cargo aircraft, heavy maintenance is a pass-through expense to our customer, Amazon.

We also outsource component maintenance. Component maintenance consists of the ongoing and routine maintenance of aircraft components that are line replaceable units. These contracts cover the majority of our aircraft component inventory acquisition, replacement and repairs, thereby reducing the need to carry extensive spare parts inventory.

Employees

As of December 31, 2021 and 2020, we had 2,181 and 1,699 employees, respectively.

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FAA regulations require pilots to have commercial licenses with specific ratings for the aircraft to be flown and to be medically certified as physically fit to fly. FAA and medical certifications are subject to periodic renewal requirements including recurrent training and recent flying experience. Mechanics, quality-control inspectors and flight dispatchers must be certificated and qualified for specific aircraft. Flight attendants must have initial and periodic competency training and qualification. Training programs are subject to approval and monitoring by the FAA. Management personnel directly involved in the supervision of flight operations, training, maintenance and aircraft inspection must also meet experience standards prescribed by FAA regulations.

As of December 31, 2021, approximately 46% of our employees were represented by labor unions under collective-bargaining agreements as set forth in the table below. Our pilots are represented by the Air Line Pilots Association, our flight attendants are represented by the International Brotherhood of Teamsters and our dispatchers are represented by the Transport Workers Union. Our dispatchers approved a new contract in December 2019, which is amendable on November 14, 2024. Our collective bargaining agreement with our flight attendants became amendable on December 31, 2019. We entered into negotiations in November 2019. Negotiations were paused by mutual consent in March 2020 due to the COVID-19 pandemic. We restarted negotiations with our flight attendants in October of 2021 and negotiations are ongoing. Our collective bargaining agreement with our pilots was ratified on December 21, 2021 and is amendable on December 31, 2026.

As of December 31, 2021, the status of the collective-bargaining agreements for our employees was as follows:

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The United States Railway Labor Act (“RLA”) governs our relations with labor organizations. Under the RLA, the collective bargaining agreements generally do not expire, but instead become amendable as of a stated date. If either party wishes to modify the terms of any such agreement, they must notify the other party in the manner agreed to by the parties. Under the RLA, after receipt of such notice, the parties must meet for direct negotiations, and if no agreement is reached, either party may request the National Mediation Board (“NMB”) to appoint a federal mediator. The RLA prescribes no set timetable for the direct negotiation and mediation process. It is not unusual for those processes to last for many months, and even for a few years. If no agreement is reached in mediation, the NMB in its discretion may declare at some time that an impasse exists, and if an impasse is declared, the NMB proffers binding arbitration to the parties. Either party may decline to submit to arbitration. If arbitration is rejected by either party, a 30-day “cooling off” period commences. During that period (or after), a Presidential Emergency Board (“PEB”) may be established, which examines the parties’ positions and recommends a solution. The PEB process lasts for 30 days and is followed by another “cooling off” period of 30 days. At the end of a “cooling off” period, unless an agreement is reached or action is taken by Congress, the labor organization may strike and the airline may resort to “self-help,” including the imposition of any or all of its proposed amendments and the hiring of new employees to replace any striking workers. Congress and the President have the authority to prevent “self-help” by enacting legislation that, among other things, imposes a settlement on the parties.

Safety and Security

Safety is the most important thing we do and we are committed to the safety and security of our passengers and employees. In addition to complying with federally regulated safety and security standards, we strive to create a culture of safety and security that achieves the highest possible industry standard.

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We have invested in a safety management system platform (ProSafeT), which allows for anonymous reporting of safety concerns by employees and business partners and promotes active participation in the identification, reduction and elimination of hazards. We also use ProSafeT as a central repository for tracking all Safety Assurance information, as well as Safety Risk Mitigation activities, creating awareness and transparency for the leadership teams to actively monitor the health of our Safety Management System (SMS) and Security Management System (SeMS). Our ongoing focus on safety relies on training our employees to proper standards and providing them with the tools and equipment they require so they can perform their job functions in a safe and efficient manner. Safety in the workplace targets several areas of our operation including: flight operations, maintenance, in-flight, dispatch and station operations.

We participate in ASIAS (FAA Aviation Safety Information Analysis and Sharing System), which is a central conduit for the exchange of safety information among its stakeholders, and FOQA (Flight Operations Quality Assurance), a structured program to gather and aggregate electronically recorded flight operations data for the purpose of identifying areas where safety, efficiency and training can be improved. We invested in CEFA animation software which creates 3D flight video simulations using our data to enhance pilot training. Furthermore, we voluntarily completed the International Air Transport Association or IATA Operational Safety Audit in June 2021, which is the benchmark for global safety. We also implemented a LOSA (Line Operations Safety Audit) program to proactively monitor and diagnose our operation’s safety performance and a SeMS to protect the Company’s assets and operations. Some of the other safety and security measures we have taken include: aircraft security and surveillance, positive bag matching procedures, enhanced passenger and baggage screening and search procedures and securing of cockpit doors.

Our ongoing focus on safety relies on transparency with our regulators, training our employees to proper standards and providing them with the tools and equipment they require so they can perform their job functions in a safe and efficient manner, and learning from industry best practices through a collaborative, inter-airline safety sharing program. Safety in the workplace targets several areas of our operation, including: flight operations, maintenance, in-flight, dispatch and station operations. In addition, we recently conducted a safety culture survey, the results of which we have used to create action plans for areas of opportunity.

Insurance

We maintain insurance policies we believe are of types customary in the airline industry and as required by the DOT, lessors and other financing parties. The policies principally provide liability coverage for public and passenger injury; damage to property; loss of or damage to flight equipment; fire; auto; directors’ and officers’ liability; advertiser and media liability; cyber risk liability; fiduciary; workers’ compensation and employer’s liability; and war risk (terrorism).

Foreign Ownership

Under federal law and DOT policy, we must be owned and controlled by U.S. citizens. The restrictions imposed by federal law and DOT policy currently require that at least 75% of our voting stock must be owned and controlled, directly and indirectly, by persons or entities who are citizens of the United States (“U.S. citizens”), as that term is defined in 49 U.S.C. §40102(a)(15), that our president and at least two-thirds of the members of our Board of Directors and other managing officers be U.S. citizens, and that we be under the actual control of U.S. citizens. In addition, at least 51% of our total outstanding stock must be owned and controlled by U.S. citizens and no more than 49% of our stock may be owned or controlled, directly or indirectly, by persons or entities who are not U.S. citizens and are from countries that have entered into “open skies” air transport agreements with the United States which allow unrestricted access between the United States and the applicable foreign country and to points beyond the foreign country on flights serving the foreign country. We are currently in compliance with these ownership provisions. For a discussion of the procedures we instituted to ensure compliance with these foreign ownership rules, please see “RISK FACTORS - Risks Related to Ownership of Our Common Stock - Our certificate of incorporation and bylaws include provisions limiting ownership and voting by non-U.S. citizens.”

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Government Regulation

Aviation Regulation

The airline industry is heavily regulated, especially by the federal government. Two of the primary regulatory authorities overseeing air transportation in the United States are the DOT and the FAA. The DOT has authority to issue certificates of public convenience and necessity, exemptions and other economic authority required for airlines to provide domestic and foreign air transportation. International routes and international code-sharing arrangements are regulated by the DOT and by the governments of the foreign countries involved. A U.S. airline’s ability to operate flights to and from international destinations is subject to the air transport agreements between the United States and the foreign country and the carrier’s ability to obtain the necessary authority from the DOT and the applicable foreign government.

The U.S. government has negotiated “open skies” agreements with many countries, which allow unrestricted access between the United States and the applicable foreign country and to points beyond the foreign country on flights serving the foreign country. With certain other countries, however, the United States has a restricted air transportation agreement. Our international flights to Mexico are governed by a liberalized bilateral air transport agreement which the DOT has determined has all of the attributes of an “open skies” agreement. Changes in the aviation policies of the United States, Mexico or other countries in which we operate could result in the alteration or termination of the corresponding air transport agreement, diminish the value of our international route authorities or otherwise affect our operations to/from these countries.

The FAA is responsible for regulating and overseeing matters relating to the safety of air carrier flight operations, including the control of navigable air space, the qualification of flight personnel, flight training practices, compliance with FAA airline operating certificate requirements, aircraft certification and maintenance requirements and other matters affecting air safety. The FAA requires each commercial airline to obtain and hold an FAA air carrier certificate. We currently hold an FAA air carrier certificate.

Airport Access

In the United States, the FAA currently regulates the allocation of take-off and landing authority, slots, slot exemptions, operating authorizations or similar capacity allocation mechanisms, which limit take-offs and landings, at certain airports. Level 1 is assigned where the capacity of airport infrastructure is generally adequate to meet the demands of airport users at all times and therefore there is no extensive pattern of delays. Level 2 is assigned where there is potential for congestion during some periods of the day, week or season, which can be resolved by schedule adjustments mutually agreed between the airlines and schedule facilitator. Level 3 is assigned where (i) demand for airport infrastructure significantly exceeds the airport’s capacity during the relevant period; (ii) expansion of airport infrastructure to meet demand is not possible in the short term; (iii) attempts to resolve the problem through voluntary schedule adjustments have failed or are ineffective; and (iv) as a result, a process of slot allocation is required whereby it is necessary for all airlines and other aircraft operators to have a slot allocated by a coordinator in order to arrive or depart at the airport during the periods when slot allocation occurs. We do not currently operate in or out of any Level 3 airports. We currently operate, or plan to operate, in and out of San Francisco International Airport (SFO), Los Angeles International Airport (LAX), Chicago O’Hare International Airport (ORD) and Newark International Airport (EWR), which are Level 2 airports.

In addition, we have arranged for service to Vancouver, Canada, with flights starting in the second quarter of 2022. Terminal access for Vancouver is controlled by Vancouver Airport Authority due to facility constraints. We have obtained the access we need to accommodate our planned service.

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Consumer Protection Regulation

The DOT also has jurisdiction over certain economic issues affecting air transportation and consumer protection matters, including unfair or deceptive practices and unfair methods of competition, lengthy tarmac delays, airline advertising, denied boarding compensation, ticket refunds, baggage liability, contracts of carriage, customer service commitments, consumer notices and disclosures, customer complaints and transportation of passengers with disabilities. The DOT frequently adopts new consumer protection regulations, such as rules to protect passengers addressing lengthy tarmac delays, chronically delayed flights, codeshare disclosure and undisclosed display bias. They also have adopted, and do adopt, new rules on airline advertising and marketing practices. The DOT also has authority to review certain joint venture agreements, marketing agreements, code-sharing agreements (where an airline places its designator code on a flight operated by another airline) and wet-leasing agreements (where one airline provides aircraft and crew to another airline) between carriers and regulates other economic matters such as slot transactions.

Security Regulation

The TSA and the CBP, each a division of the U.S. Department of Homeland Security, are responsible for certain civil aviation security matters, including passenger and baggage screening at U.S. airports, and international passenger prescreening prior to entry into or departure from the United States. International flights are subject to customs, border, immigration and similar requirements of equivalent foreign governmental agencies. We are currently in compliance with all directives issued by such agencies.

Environmental Regulation

We are subject to various federal, state, foreign and local laws and regulations relating to the protection of the environment and affecting matters such as air emissions (including GHG emissions), noise emissions, discharges to surface and subsurface waters, safe drinking water, and the use, management, release, discharge and disposal of, and exposure to, materials and chemicals.

We are also subject to environmental laws and regulations that require us to investigate and remediate soil or groundwater to meet certain remediation standards. Under certain laws, generators of waste materials, and current and former owners or operators of facilities, can be subject to liability for investigation and remediation costs at locations that have been identified as requiring response actions. Liability under these laws may be strict, joint and several, meaning that we could be liable for the costs of cleaning up environmental contamination regardless of fault or the amount of wastes directly attributable to us.

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GHG Emissions

Concern about climate change and greenhouse gases has resulted, and is expected to continue to result, in additional regulation or taxation of aircraft emissions in the United States and abroad. In particular, on March 6, 2017, the ICAO or International Civil Aviation Organization, an agency of the United Nations established to manage the administration and governance of the Convention on International Civil Aviation, adopted new carbon dioxide, or CO2 certification standards for new aircraft beginning in 2020. The new CO2 standards will apply to new aircraft type designs from 2020, and to aircraft type designs already in production as of 2023. In-production aircraft that do not meet the standard by 2028 will no longer be able to be produced unless their designs are modified to meet the new standards. In August 2016, the EPA made a final endangerment finding that GHG emissions cause or contribute to air pollution that may reasonably be anticipated to endanger public health or welfare, which obligates the EPA under the Clean Air Act to set GHG emissions standards for aircraft. On January 11, 2021, the EPA issued a proposed rule regulating GHG emissions from aircraft that largely conforms to the March 2017 ICAO standards. However, President Biden, who is expected to promote more aggressive policies with respect to climate change and carbon emissions, including in the aviation sector, issued an executive order calling for a review of regulatory actions of the prior administration for their consistency with the Biden administration’s policies, including with respect to climate change. Accordingly, there may be future rulemaking that may result in stricter GHG emissions standards than those contained in the proposed rule.

In addition, in October 2016, the ICAO adopted the CORSIA, which is a global, market-based emissions offset program designed to encourage carbon-neutral growth beyond 2020. The CORSIA will increase operating costs for us and other U.S. airlines that operate internationally. The CORSIA is being implemented in phases, with information sharing that began in 2019 and a pilot phase that began in 2021. Certain details are still being developed and the impact cannot be fully predicted.

Noise

Federal law recognizes the right of airport operators with special noise problems to implement local noise abatement procedures so long as those procedures do not interfere unreasonably with interstate and foreign commerce and the national air transportation system, subject to FAA review under the Airport Noise and Control Act of 1990. These restrictions can include limiting nighttime operations, directing specific aircraft operational procedures during take-off and initial climb and limiting the overall number of flights at an airport. While we have had sufficient scheduling flexibility to accommodate local noise restrictions in the past, our operations could be adversely impacted if ICAO or locally imposed regulations become more restrictive or widespread.

Other Regulations

Airlines are also subject to various other federal, state, local and foreign laws and regulations. For example, the U.S. Department of Justice has jurisdiction over certain airline competition matters. The privacy and security of passenger and employee data is regulated by various domestic and foreign laws and regulations.

ITEM 1A: RISK FACTORS

You should carefully consider the risks and uncertainties described below, as well as the other information contained in this Annual Report, including our consolidated financial statements and the related notes thereto included elsewhere in this Annual Report and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” In addition, past financial performance may not be a reliable indicator of future performance and historical trends should not be used to anticipate results or trends in future periods. Any of the following risks could materially adversely affect our business, financial condition and results of operations.

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Risks Related to Our Industry

The global pandemic resulting from the novel coronavirus has had and continues to have an adverse impact that has been and continues to be material to our business, operating results, financial condition and liquidity, and the duration and spread of the pandemic could result in additional adverse impacts. A worsening of the outbreak or another disease or similar public health threat in the future could also have an adverse effect on our business, operating results, financial condition and liquidity.

On March 11, 2020, the World Health Organization declared COVID-19 a global pandemic causing a massive market disruption to the aviation industry. Measures such as travel restrictions, including testing regimes, “stay at home” and quarantine orders, limitations on public gatherings, cancellation of public events and many others have resulted in a decline in demand for air travel.

While most restrictions have been removed in the United States, and a recovery appears to be underway in the domestic airline industry, additional governmental and other restrictions and regulations that may be implemented in the future in response to further outbreaks of COVID-19 include additional travel restrictions (including expanded restrictions on domestic air travel within the United States), quarantines of additional populations (including our personnel), limitations on aircraft capacity, testing requirements and restrictions on our ability to access our facilities or aircraft or requirements to collect additional passenger data. In addition, governments, non-governmental organizations and entities in the private sector may issue non-binding advisories or recommendations regarding air travel or other physical distancing measures, including limitations on the number of persons that should be present at public gatherings, which may significantly reduce demand. These and other restrictions and regulations have had, and will continue to have, a material adverse impact on our business, operating results, financial condition and liquidity.

We began experiencing a significant decline in demand related to COVID-19 during the first quarter of 2020, and this reduction in demand has continued through December 2021. The decline in demand caused a material deterioration in our revenues. We plan to proactively manage capacity for the foreseeable future, which has a negative impact on our revenue. We expect to continue our proactive management of costs, but decreased demand can lead to higher unit costs. In addition, actual or perceived risk of infection on our flights could have a material adverse effect on the public’s demand for and willingness to use air travel, which could harm our reputation and business. Demand for scheduled service business is negatively correlated to case counts in Minnesota and the destinations of our scheduled flights and to the extent that variants cause higher case counts, we could see further reductions in demand. Furthermore, historically, unfavorable U.S. economic conditions have driven changes in travel patterns, including significantly and materially reduced spending for both leisure and business travel. Unfavorable economic conditions, when low fares are often used to stimulate traffic, have also historically hampered the ability of airlines to raise fares to counteract any increases in fuel, labor and other costs. Any significant increases in unemployment in the United States would likely continue to have a negative impact on passenger bookings, especially when the customers we serve are paying with their own money, and these effects could exist for an extensive period of time. Even once the pandemic and fears of travel subside, demand for air travel may remain weak for a significant period of time. Apart from the decrease in demand, passenger bookings have been on average much closer to the date of service during pandemic than in prior periods, which has reduced our visibility into future revenue.

In addition to the schedule reductions discussed above, we continue to focus on reducing expenses and managing our liquidity and we expect to continue to modify our cost management structure, liquidity-raising efforts and capacity as the timing of demand recovery becomes more certain.

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On April 20, 2020, we entered into a Payroll Support Program Agreement under the CARES Act with Treasury governing our participation in the Payroll Support Program and, on January 29, 2021, we entered into a second Payroll Support Program Agreement under the CARES Act. Under the Payroll Support Program, Treasury provided us with an aggregate of $62,312 in grants from April 21, 2020 to October 1, 2020 and an additional $37,040 in grants during the first half of 2021 (collectively, the “Payroll Support Payments”). Further, we were notified on April 15, 2021 that we would receive a grant of $34,547 under Payroll Support Program 3, which was received during April and May 2021. In addition, on October 26, 2020, we entered into a loan and guarantee agreement (the “CARES Act Loan Agreement”) with the Treasury under the aviation direct loan program of the CARES Act, pursuant to which the Treasury agreed to extend loans to us in an aggregate principal amount of $45,000, subject to specified terms, which was due to be repaid on the earlier of (i) October 24, 2025 or (ii) six months prior to the expiration date of any material loyalty program securing the loan. We used a portion of the net proceeds from our initial public offering to repay in full all amounts outstanding under the CARES Act Loan. The substance and duration of restrictions to which we are subject under the grants and/or loans under the CARES Act, including, but not limited to, those outlined below could materially affect our operations, and we may not be successful in managing these impacts. Further, these restrictions could limit our ability to take actions that we otherwise might have determined to be in the best interest of our company and our stockholders. In particular, limitations on executive compensation may impact our ability to attract and retain senior management or attract other key employees during this critical time. Additionally, limitations on dividends and buybacks may diminish investor interest in our stock. See “—Risks Related to Our Business—We are subject to certain restrictions on our business as a result of our participation in governmental programs under the CARES Act and we may be subject to similar or other restrictions pursuant to future governmental programs.”

Our operations may be further impacted in the event of additional instances of actual or perceived risk of infection among our employees, suppliers or business partners, and this impact may have a material adverse effect if we are unable to maintain a suitably skilled and sized workforce and address related employee matters. In addition, supply chain disruptions may impede our cargo customers’ ability to deliver freight to the airports we serve, which could reduce their need for our services and thus have a material adverse effect on our business, results of operations and financial condition.

The industry may also be subject to enhanced health and hygiene requirements in attempts to counteract future outbreaks, which requirements may be costly and take a significant amount of time to implement, or drive additional staffing during a time when staffing shortages are commonplace.

We may take additional actions to improve our financial position, including measures to improve liquidity, such as the issuance of unsecured and secured debt securities, equity securities and equity-linked securities, the sale of assets and/or the entry into additional bilateral and syndicated secured and/or unsecured credit facilities. There can be no assurance as to the timing of any such issuance, which may be in the near term, or that any such additional financing will be completed on favorable terms, or at all. Any such actions may be material in nature and could result in significant additional borrowing. Our reduction in expenditures, measures to improve liquidity or other strategic actions that we may take in the future in response to COVID-19 may not be effective in offsetting decreased demand, and we will not be permitted to take certain strategic actions as a result of the CARES Act, which could result in a material adverse effect on our business, operating results, liquidity and financial condition.

The full extent of the ongoing impact of COVID-19 on our longer-term operational and financial performance will depend on future developments, many of which are outside of our control, including the effectiveness of the mitigation strategies discussed above, the duration, spread, severity and recurrence of COVID-19 and any COVID-19 variants and related travel advisories and restrictions, the efficacy of COVID-19 vaccines, the impact of COVID-19 on overall long-term demand for air travel, including after the pandemic subsides, the impact of COVID-19 on the financial health and operations of our business partners, future governmental actions, including their duration and scope, and our access to capital, all of which are highly uncertain and cannot be predicted.

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In addition, an outbreak of another disease or similar public health threat, or fear of such an event, that affects travel demand, travel behavior, travel restrictions or adversely affects supply chains, which would impact our cargo business, could have a material adverse impact on our business, operating results, liquidity and financial condition. Outbreaks of other diseases could also result in increased government restrictions and regulation, such as those actions described above or otherwise, which could adversely affect our business, operating results, financial condition and liquidity.

Even after the COVID-19 pandemic has moderated and the enhanced screenings, quarantine and other requirements, and travel restrictions have eased, we may continue to experience similar adverse effects to our business, operating results, financial condition and liquidity resulting from a recessionary or depressed economic environment that may persist, including increases in unemployment, and our business and operating results may not return to pre-COVID-19 pandemic levels on a timely basis or at all. The impact that the COVID-19 pandemic will have on our businesses, operating results, financial condition and liquidity could exacerbate the other risks identified in this report.

We are depending upon continued uptake of the COVID-19 vaccine by the general public in order to normalize economic conditions, the airline industry and our business operations and to realize our planned financial and growth plans and business strategy. The failure of a vaccine, significant unplanned adverse reactions to the vaccine, politicization of the vaccine or general public distrust of the vaccine, or a vaccine requirement to travel, could have an adverse effect on our business, results of operations, financial condition and prospects.

Our financial and operating results and business operations for our scheduled service and charter businesses for the years ended December 31, 2021 and 2020 were materially and adversely impacted as a result of the COVID-19 pandemic, which impact is likely to continue during the duration of the COVID-19 pandemic. We are depending upon an efficient distribution and sufficient supply of the COVID-19 vaccine, and continued uptake by the general public in order to normalize economic conditions, the airline industry and our business operations and to realize our financial and growth plans and business strategy. To date, COVID-19 vaccinations have been widespread, but many remain unvaccinated, as the long-term efficacy of the vaccines, including against variants, remains uncertain. The failure of a vaccine, including to the extent it is not effective against any COVID-19 variants, significant unplanned adverse reactions to the vaccine, politicization of the vaccine or general public distrust of the vaccine, especially if combined with a vaccine requirement to travel, could have an adverse effect on our business, results of operations, financial condition and prospects.

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The demand for airline services is highly sensitive to changes in economic conditions, and another recession or similar or worse economic downturn in the United States would weaken demand for our services and have a material adverse effect on our business, results of operations and financial condition.

The demand for travel and cargo services is affected by U.S. and global economic conditions. Unfavorable economic conditions have historically reduced aviation spending. For most passengers visiting friends and relatives and cost-conscious leisure travelers (our primary market), travel is a discretionary expense, and during periods of unfavorable economic conditions as a result of such carriers’ low base fares travelers have often elected to replace air travel at such times with car travel or other forms of ground transportation or have opted not to travel at all. Likewise, during periods of unfavorable economic conditions, businesses have deferred air travel or forgone it altogether. Additionally, retail and thus cargo demand can also decrease. Furthermore, most of our charter revenue is generated from ad hoc or short-term contracts with repeat customers, and these customers may cease using our services or seek to negotiate more aggressive pricing during periods of unfavorable economic conditions. Any reduction in charter or cargo revenue during such periods could also increase our unit costs and thus have a material adverse effect on our business, results of operations and financial condition. Travelers have also reduced spending by purchasing fewer ancillary services, which can result in a decrease in average revenue per seat. Because airlines typically have relatively high fixed costs as a percentage of total costs, much of which cannot be mitigated during periods of lower demand for air travel or cargo services, the airline business is particularly sensitive to changes in economic conditions. Furthermore, if the COVID-19 pandemic leads to a recession or depression, this could result in further reductions in demand for our services. A reduction in the demand for air travel or cargo services due to unfavorable economic conditions also limits our ability to raise fares or fees for cargo services to counteract increased fuel, labor and other costs. If U.S. or global economic conditions are unfavorable or uncertain for an extended period of time, it would have a material adverse effect on our business, results of operations and financial condition.

Our business has been, and in the future may be, materially adversely affected by the price and availability of aircraft fuel. Unexpected increases in the price of aircraft fuel or a shortage or disruption in the supply of aircraft fuel could have a material adverse effect on our business, results of operations and financial condition.

The cost of aircraft fuel is highly volatile and in recent years has been our largest individual operating expense, accounting for approximately 25.0%, 21.7% and 26.6% of our operating expenses for the years ended December 31, 2021, 2020 and 2019, respectively. High fuel prices or increases in fuel costs (or in the price of crude oil) could have a material adverse effect on our business, results of operations and financial condition, including as a result of legacy network airlines and LCCs adapting more rapidly or effectively to higher fuel prices through new-technology aircraft that is more fuel efficient than our aircraft. Over the past several years, the price of aircraft fuel has fluctuated substantially and prices continue to be highly volatile and have recently increased significantly. In addition, prolonged low fuel prices could limit our ability to differentiate our product and low fares from those of the legacy network airlines and LCCs, as prolonged low fuel prices could enable such carriers to, among other things, substantially decrease their costs, fly longer stages or utilize older aircraft.

Our business is also dependent on the availability of aircraft fuel (or crude oil), which is not predictable. Weather-related events, natural disasters, terrorism, wars, supply chain disruptions, political disruption or instability involving oil-producing countries, changes in governmental or cartel policy concerning crude oil or aircraft fuel production, labor strikes or other events affecting refinery production, transportation, taxes or marketing, environmental concerns, market manipulation, price speculation, changes in currency exchange rates and other unpredictable events may drive actual or perceived fuel supply shortages. Shortages in the availability of, or increases in demand for, crude oil in general, other crude oil-based fuel derivatives and aircraft fuel in particular could result in increased fuel prices and could have a material adverse effect on our business, results of operations and financial condition.

We may not be able to increase ticket prices sufficiently to cover increased fuel costs, particularly when fuel prices rise quickly. We sell a significant number of tickets to passengers well in advance of travel, and, as a

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result, fares sold for future travel may not reflect increased fuel costs. In addition, our ability to increase ticket prices to offset an increase in fuel costs is limited by the competitive nature of the airline industry and the price sensitivity associated with air travel, particularly leisure travel, and any increases in fares may reduce the general demand for air travel. Additionally, our cargo and charter customers may choose to refuse fuel pass-through contracts, which could drive down the profitability of those agreements.

From time to time, we may enter into fuel derivative contracts in order to mitigate the risk to our business from future volatility in fuel prices but such contracts may not fully protect us from all related risks. Generally speaking, our charter and cargo operations have pass-through provisions for fuel costs, and as such we do not hedge our fuel requirements for that portion of our business. As of December 31, 2021, we had no outstanding fuel derivative contracts.

We may enter into derivatives that do not qualify for hedge accounting, which can impact our results of operations and increase the volatility of our earnings due to recognizing the mark-to-market impact of our hedge portfolio as a result of changes in the forward markets for oil and/or jet fuel. We cannot assure you our fuel hedging program will be effective or that we will maintain a fuel hedging program. Even if we are able to hedge portions of our future fuel requirements, we cannot guarantee that our hedge contracts will provide an adequate level of protection against increased fuel costs or that the counterparties to our hedge contracts will be able to perform. Additionally, our ability to realize the benefit of declining fuel prices will be limited by the impact of any fuel hedges in place, we may incur additional expenses in connection with entering into derivative contracts and we may record significant losses on fuel hedges during periods of declining prices. A failure of our fuel hedging strategy, potential margin funding requirements, overpaying for fuel through the use of hedging arrangements or our failure to maintain a fuel hedging program could prevent us from adequately mitigating the risk of fuel price increases and could have a material adverse effect on our business, results of operations and financial condition.

Threatened or actual terrorist attacks or security concerns involving airlines could have a material adverse effect on our business, results of operations and financial condition.

Past terrorist attacks or attempted attacks, particularly those against airlines, have caused substantial revenue losses and increased security costs, and any actual or threatened terrorist attack or security breach, even if not directly against an airline, could have a material adverse effect on our business, results of operations and financial condition. Security concerns resulting in enhanced passenger screening, increased regulation governing carry-on baggage and cargo and other similar restrictions on passenger travel and cargo may further increase passenger inconvenience and reduce the demand for air travel or increase costs associated with providing cargo service. In addition, increased or enhanced security measures have tended to result in higher governmental fees imposed on airlines, resulting in higher operating costs for airlines, which we may not be able to pass on to customers in the form of higher prices. Terrorist attacks, or the fear of such attacks or other hostilities (including elevated national threat warnings or selective cancellation or redirection of flights due to terror threats), even if not made directly on or involving the airline industry, could have a negative impact on the airline industry and have a material adverse effect on our business, results of operations and financial condition.

The airline industry is exceedingly competitive, and we compete against new entrants, LCCs, ULCCs, legacy network airlines and cargo carriers; if we are not able to compete successfully in our markets, our business will be materially adversely affected.

We face significant competition with respect to routes, fares and services. Within the airline industry, we compete with new airlines, ULCCs, LCCs and legacy network airlines for airline passengers traveling on the routes we serve, particularly customers traveling in economy or similar classes of service. Competition on most of the routes we presently serve is intense, due to the large number of carriers in those markets. Furthermore, other airlines or new airlines may begin service or increase existing service on routes where we currently face no or little competition. In almost all instances, our competitors are larger than we are and possess significantly greater financial and other resources than we do.

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The airline industry is particularly susceptible to price discounting because once a flight is scheduled, airlines incur only nominal additional costs to provide service to passengers occupying otherwise unsold seats. Increased fare or other price competition could adversely affect our operations. Airlines typically use discount fares and other promotions to stimulate traffic during normally slower travel periods to generate cash flow and to increase revenue per available seat mile. The prevalence of discount fares can be particularly acute when a competitor has excess capacity to sell. Moreover, many other airlines have unbundled their services, at least in part, by charging separately for services such as baggage and advance seat selection, which previously were offered as a component of base fares. This unbundling and other cost-reducing measures could enable competitor airlines to reduce fares on routes that we serve. The availability of low-priced fares coupled with an increase in domestic capacity has led to dramatic changes in pricing behavior in many U.S. markets. Many domestic carriers began matching lower cost airline pricing, either with limited or unlimited inventory.

During economic downturns, including during a health crisis, our competitors may choose to take an aggressive posture toward market share growth on routes where we compete, which would flood a low demand market with additional capacity that drives down fares, which could have a material adverse effect on our business, results of operations and financial condition.

Our growth and the success of our high-growth, low-cost business model could stimulate competition in our markets through our competitors’ development of their own LCC or ULCC strategies, new pricing policies designed to compete with LCCs, ULCCs or new market entrants. Airlines increase or decrease capacity in markets based on perceived profitability. If our competitors increase overall industry capacity, or capacity dedicated to a particular domestic or foreign region, market or route that we serve, it could have a material adverse impact on our business. If a legacy network airline were to successfully develop a low-cost product or if we were to experience increased competition from LCCs, our business could be materially adversely affected. Regardless of cost structure, the domestic airline industry has often been the source of fare wars undertaken to grow market share or for other reasons.

A competitor adopting an LCC or ULCC strategy may have greater financial resources and access to lower cost sources of capital than we do, which could enable them to operate their business with a lower cost structure, or enable them to operate with lower marginal revenues without substantial adverse effects, than we can. If these competitors adopt and successfully execute an LCC or ULCC business model, our business could be materially adversely affected.

Similarly, our competitors may choose to commence or expand their existing charter operations, which could adversely impact our ability to obtain or renew charter contracts, especially in periods of low demand. This could result in decreases in our charter services market share and reduced profitability for our charter operations, which would have a material adverse effect on our business, results of operations and financial condition.

Our competitors may also choose to commence, or expand their existing, cargo operations. In addition, our competitors could seek to provide cargo services to Amazon, which could adversely impact our ability to maintain or renew the ATSA. This could result in reduced frequencies for our cargo operations, which could have a material adverse effect on our business, results of operations and financial condition.

There has been significant consolidation within the airline industry, including, for example, the combinations of American Airlines and US Airways, Delta Air Lines and Northwest Airlines, United Airlines and Continental Airlines, Southwest Airlines and AirTran Airways, and Alaska Airlines and Virgin America. In the future, there may be additional consolidation in our industry. Business combinations could significantly alter industry conditions and competition within the airline industry and could permit our competitors to reduce their fares.

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The extremely competitive nature of the airline industry could prevent us from attaining the level of passenger traffic or maintaining the level of fares or ancillary revenues required to sustain profitable operations in new and existing markets and could impede our growth strategy, which could harm our operating results. Due to our relatively small size, we are susceptible to a fare war or other competitive activities in one or more of the markets we serve, which could have a material adverse effect on our business, results of operations and financial condition.

Airlines are often affected by factors beyond their control including: air traffic congestion at airports; air traffic control inefficiencies; air traffic control staffing and pandemic impact; government shutdowns or mandates; FAA grounding of aircraft; major construction or improvements at airports; adverse weather conditions, such as hurricanes or blizzards; increased security measures; new travel-related taxes; or the outbreak of disease, any of which could have a material adverse effect on our business, results of operations and financial condition.

Like other airlines, our business is affected by factors beyond our control, including air traffic congestion at airports, air traffic control inefficiencies, major construction or improvements at airports at which we operate, increased security measures, new travel-related taxes and fees, adverse weather conditions, natural disasters and the outbreak of disease. Factors that cause flight delays frustrate passengers and increase costs and decrease revenues, which in turn could adversely affect profitability. The federal government controls all U.S. airspace, and airlines are completely dependent on the FAA to operate that airspace in a safe, efficient and affordable manner. The air traffic control system, which is operated by the FAA, faces challenges in managing the growing demand for U.S. air travel. U.S. and foreign air traffic controllers often rely on outdated technologies that routinely overwhelm the system and compel airlines to fly inefficient, indirect routes resulting in delays. The federal government also controls airport security. In addition, there are proposals before Congress that would treat a wide range of consumer protection issues, which could increase the costs of doing business. Further, implementation of the Next Generation Air Transport System, or NextGen, by the FAA would result in changes to aircraft routings and flight paths that could lead to increased noise complaints and lawsuits, resulting in increased costs. In addition, federal government shutdowns can affect the availability of federal resources necessary to provide air traffic control and airport security. Furthermore, a federal government grounding of our aircraft type could result in flight cancellations and adversely affect our business. Governmental mandates requiring certain behaviors from employees, including COVID-19 vaccine mandates, could limit our ability to staff to meet demand because employees may choose to resign or decide not to apply for or accept open positions. Specifically, President Biden’s recent Executive Order mandating that employers who maintain government contracts must require all employees to be fully vaccinated applies to our business and could have a negative impact on our ability to retain employees or hire new employees, which may adversely impact our business.

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Adverse weather conditions and natural disasters, such as hurricanes, thunderstorms, winter snowstorms or earthquakes, can cause flight cancellations or significant delays, and in the past have led to Congressional demands for investigations. Cancellations or delays due to adverse weather conditions or natural disasters, air traffic control problems or inefficiencies, breaches in security or other factors may affect us to a greater degree than other, larger airlines that may be able to recover more quickly from these events, and therefore could have a material adverse effect on our business, results of operations and financial condition to a greater degree than other air carriers. Because of our day of week, limited schedule and optimized utilization and point-to-point network, operational disruptions can have a disproportionate impact on our ability to recover. In addition, many airlines reaccommodate their disrupted passengers on other airlines at prearranged rates under flight interruption manifest agreements. We have been unsuccessful in procuring any of these agreements with our peers, which makes our recovery from disruption more challenging than for larger airlines that have these agreements in place. Similarly, outbreaks of pandemic or contagious diseases, such as ebola, measles, avian flu, severe acute respiratory syndrome (SARS), COVID-19, H1N1 (swine) flu, pertussis (whooping cough) and zika virus, or their respective variants, could result in significant decreases in passenger traffic and the imposition of government restrictions in service and could have a material adverse impact on the airline industry. Any increases in travel-related taxes could also result in decreases in passenger traffic. Any general reduction in airline passenger traffic could have a material adverse effect on our business, results of operations and financial condition. Moreover, U.S. federal government shutdowns may cause delays and cancellations or reductions in discretionary travel due to longer security lines, including as a result of furloughed government employees or reductions in staffing levels, including air traffic controllers. U.S. government shutdowns may also impact our ability to take delivery of aircraft and commence operations in new domestic stations. Another extended shutdown like the instance in December 2018-January 2019 may have a negative impact on our operations and financial results.

The industry is experiencing higher than normal number of pilot retirements, increased competition in pilot hiring, more stringent duty time regulations, increased flight hour requirements for commercial airline pilots, reductions in the number of military pilots entering the commercial workforce, increased training requirements and other factors that may lead to a shortage of pilots, which could materially adversely affect our business.

Large numbers of pilots in the industry are approaching the FAA’s mandatory retirement age of 65 or have otherwise accepted an early retirement during the COVID-19 pandemic. Commercial airline pilots are subject to rigorous certification standards and must adhere to flight time and rest requirements. Commencing in 2013, the minimum flight hour requirement to achieve a commercial pilot’s license in the United States increased from 250 to 1,500 hours, thereby significantly increasing the time and cost commitment required to become licensed to fly a commercial aircraft. Additionally, the number of military pilots being trained by the U.S. armed forces and available as commercial pilots upon their retirement from military service has been decreasing. These and other factors may lead to a shortage of qualified, entry-level pilots and increased compensation costs, particularly at carriers other than the large legacy carriers. The foregoing factors may lead to additional competition from carriers attempting to meet their hiring needs. If a shortage of pilots materializes, airlines may be unable to hire adequate numbers of pilots to meet their needs, resulting in a reduction in the number of flights offered, disruptions, increased costs of operations, financial difficulties and other adverse effects, and these circumstances may become more severe in the future and thereby cause a material adverse effect on our business.

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Risks associated with our presence in international markets, including political or economic instability, and failure to adequately comply with existing and changing legal requirements, may materially adversely affect us.

Some of our target growth markets include countries with less developed economies, legal systems, financial markets and business and political environments that are vulnerable to economic and political disruptions, such as significant fluctuations in gross domestic product, interest and currency exchange rates, civil disturbances, government instability, nationalization and expropriation of private assets, trafficking and the imposition of taxes or other charges by governments, as well as health and safety concerns. The occurrence of any of these events in markets served by us now or in the future and the resulting instability may have a material adverse effect on our business, results of operations and financial condition.

We emphasize compliance with all applicable laws and regulations in all jurisdictions where we operate and have implemented and continue to implement and refresh policies, procedures and certain ongoing training of our employees, third-party providers and partners with regard to business ethics and key legal requirements; however, we cannot assure that our employees, third-party providers or partners will adhere to our code of ethics, other policies or other legal requirements. If we fail to enforce our policies and procedures properly or maintain adequate recordkeeping and internal accounting practices to record our transactions accurately, we may be subject to sanctions. In the event we believe or have reason to believe our employees, third-party providers or partners have or may have violated applicable laws or regulations, we may incur investigation costs, potential penalties and other related costs, which in turn may materially adversely affect our reputation and could have a material adverse effect on our business, results of operations and financial condition.

Increases in insurance costs or reductions in insurance coverage may have a material adverse effect on our business, results of operations and financial condition.

If any of our aircraft were to be involved in a significant accident or if our property or operations were to be affected by a significant natural catastrophe or other event, we could be exposed to material liability or loss. If insurance markets harden due to other airline global incidents, general aviation incidents or other economic factors, we could be unable to obtain sufficient insurance (including aviation hull and liability insurance and property and business interruption coverage) to cover such liabilities or losses, our business could be materially adversely affected.

We currently obtain war risk insurance coverage (terrorism insurance) as part of our commercial aviation hull and liability policy, and additional excess third-party war risk insurance through the commercial aviation war risk market. Our current war risk insurance from commercial underwriters excludes nuclear, radiological and certain other events. The global insurance market for aviation-related risks has been faced with significant losses, resulting in substantial tightening in insurance markets with reduced capacity and increased prices. If we are unable to obtain adequate third-party hull and liability or third-party war risk (terrorism) insurance or if an event not covered by the insurance we maintain were to take place, our business could be materially adversely affected.

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The airline industry is heavily taxed.

The airline industry is subject to extensive government fees and taxation that negatively impact our revenue and profitability. The U.S. airline industry is one of the most heavily taxed of all industries. These fees and taxes have grown significantly in the past decade for domestic flights, and various U.S. fees and taxes also are assessed on international flights. For example, as permitted by federal legislation, most major U.S. airports impose a passenger facility charge per passenger on us. In addition, the governments of foreign countries in which we operate impose on U.S. airlines, including us, various fees and taxes, and these assessments have been increasing in number and amount in recent years. Moreover, we are obligated to collect a federal excise tax, commonly referred to as the “ticket tax,” on domestic and international air transportation. We collect the excise tax, along with certain other U.S. and foreign taxes and user fees on air transportation (such as passenger security fees), and pass along the collected amounts to the appropriate governmental agencies. Although these taxes and fees are not our operating expenses, they represent an additional cost to our customers, that can drive down demand as we operate in a highly elastic environment, drives down demand. There are continuing efforts in Congress and in other countries to raise different portions of the various taxes, fees, and charges imposed on airlines and their passengers, including the passenger facility charge, and we may not be able to recover all of these charges from our customers. Increases in such taxes, fees and charges could negatively impact our business, results of operations and financial condition.

Under regulations set forth by the Department of Transportation, or the DOT, all governmental taxes and fees must be included in the prices we quote or advertise to our customers. Due to the competitive revenue environment, many increases in these fees and taxes have been absorbed by the airline industry rather than being passed on to the customer. Further increases in fees and taxes may reduce demand for air travel, and thus our revenues.

Restrictions on or increased taxes applicable to charges for ancillary products and services paid by airline passengers and burdensome consumer protection regulations or laws could harm our business, results of operations and financial condition.

For the years ended December 31, 2021, 2020 and 2019 we generated ancillary revenues of $117,237, $68,055 and $118,158, respectively. Our ancillary revenue consists primarily of revenue generated from air travel-related services such as baggage fees, seat selection and upgrade fees, itinerary service fees, on-board sales and sales of trip insurance. The DOT has rules governing many facets of the airline-consumer relationship, including, for instance, consumer notice requirements, handling of consumer complaints, price advertising, lengthy tarmac delays, oversales and denied boarding process/compensation, ticket refunds, liability for loss, delay or damage to baggage, customer service commitments, contracts of carriage, consumer disclosures and the transportation of passengers with disabilities. The DOT periodically audits airlines to determine whether such airlines have violated any of the DOT rules. If the DOT determines that we are not, or have not been, in compliance with these rules or if we are unable to remain compliant, the DOT may subject us to fines or other enforcement action. The DOT may also impose additional consumer protection requirements, including adding requirements to modify our websites and computer reservations system, which could have a material adverse effect on our business, results of operations and financial condition. The U.S. Congress and the DOT have examined the increasingly common airline industry practice of unbundling the pricing of certain products and ancillary services, a practice that is a core component of our business strategy. If new laws or regulations are adopted that make unbundling of airline products and services impermissible, or more cumbersome or expensive, or if new taxes are imposed on ancillary revenues, our business, results of operations and financial condition could be negatively impacted. Congressional, Federal agency and other government scrutiny may also change industry practice or the public’s willingness to pay for ancillary services. See also “—Risks Related to Our Business—We are subject to extensive regulation by the FAA, the DOT, the TSA, CBP and other U.S. and foreign governmental agencies, compliance with which could cause us to incur increased costs and adversely affect our business, results of operations and financial condition.”

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We are subject to risks associated with climate change, including increased regulation to reduce emissions of greenhouse gases.

Concern about climate change and greenhouse gases has resulted, and is expected to continue to result, in additional regulation or taxation of aircraft emissions in the United States and abroad. In particular, on March 6, 2017, ICAO, an agency of the United Nations established to manage the administration and governance of the Convention on International Civil Aviation, adopted new carbon dioxide, or CO2 certification standards for new aircraft beginning in 2020. The new CO2 standards will apply to new aircraft type designs from 2020, and to aircraft type designs already in production as of 2023.

In-production aircraft that do not meet the standard by 2028 will no longer be able to be produced unless their designs are modified to meet the new standards. In August 2016, the Environmental Protection Agency, or the EPA, made a final endangerment finding that aircraft engine greenhouse gas, or GHG, emissions cause or contribute to air pollution that may reasonably be anticipated to endanger public health or welfare, which obligates the EPA under the Clean Air Act to set GHG emissions standards for aircraft. On January 11, 2021, the EPA issued a rule regulating GHG emissions from aircraft that largely conforms to the March 2017 ICAO standards. However, on January 20, 2021, President Biden, who is expected to promote more aggressive policies with respect to climate change and carbon emissions, issued an executive order calling for a review of regulatory actions of the prior administration for their consistency with the Biden administration’s policies, including with respect to climate change. Accordingly, may result in stricter GHG emissions standards than those contained in the rule. In addition, federal climate legislation, including the “Green New Deal” resolution, has been introduced in Congress recently, although Congress has yet to pass a bill specifically addressing GHG regulation. Several states are also considering or have adopted initiatives to regulate emissions of GHGs, primarily through the planned development of GHG emissions inventories and/or regional cap-and-trade programs.

In addition, in October 2016, the ICAO adopted the Carbon Offsetting and Reduction Scheme for International Aviation, or CORSIA, which is a global, market-based emissions offset program designed to encourage carbon-neutral growth beyond 2020. Further, in June 2018 the ICAO adopted standards pertaining to the collection and sharing of information on international aviation emissions beginning in 2019. The CORSIA will increase operating costs for us and other U.S. airlines that operate internationally. The CORSIA is being implemented in phases, with information sharing beginning in 2019 and a pilot phase beginning in 2021. Certain details are still being developed and the impact cannot be fully predicted. The potential impact of the CORSIA or other emissions-related requirements on our costs will ultimately depend on a number of factors, including baseline emissions, the price of emission allowances or offsets that we would need to acquire, the efficiency of our fleet and the number of flights subject to these requirements. These costs have not been completely defined and could fluctuate.

In the event that legislation or regulation with respect to GHG emissions associated with aircraft or applicable to the fuel industry is enacted in the United States or other jurisdictions where we operate or where we may operate in the future, or as part of international conventions to which we are subject, it could result in significant costs for us and the airline industry. In addition to direct costs, such regulation may have a greater effect on the airline industry through increases in fuel costs that could result from fuel suppliers passing on increased costs that they incur under such a system.

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We face competition from air travel substitutes.

In addition to airline competition from legacy network airlines, LCCs and ULCCs, we also face competition from air travel substitutes. Our business serves primarily leisure travelers, for whom travel is entirely discretionary. On our domestic routes, particularly those with shorter stage lengths, we face competition from some other transportation alternatives, such as bus, train or automobile. The new presidential administration and the new Secretary of the Department of Transportation have indicated strong support for trains. In addition, technology advancements may limit the demand for air travel. For example, video teleconferencing and other methods of electronic communication may reduce the need for in-person communication and add a new dimension of competition to the industry as travelers seek lower-cost substitutes for air travel. The COVID-19 pandemic has accelerated adoption of such technology and customers may be more likely to think it is sufficient for their needs, which could reduce demand for air travel. If we are unable to stimulate demand for air travel with our low base fares or if we are unable to adjust rapidly in the event the basis of competition in our markets changes, it could have a material adverse effect on our business, results of operations and financial condition.

Risks Related to Our Business

If we fail to implement our business strategy successfully, our business will be materially adversely affected.

Our business strategy includes growth in our aircraft fleet, expansion of markets we serve by building out our MSP hub, growing our seat share at MSP and growing non-MSP point-to-point markets, increasing the seats in each aircraft, expanding our ancillary product offering and growing our charter service. When developing our route network, we focus on gaining market share on routes that have been underserved or are served primarily by higher cost airlines where we have a competitive cost advantage. Effectively implementing our growth strategy is critical for our business to achieve economies of scale and to sustain or increase our profitability. The COVID-19 pandemic adversely affected our growth plans and business strategy. We face numerous challenges in implementing our growth strategy, including our ability to:

If we are unable to obtain and maintain access to a sufficient number of slots, gates or related ground facilities at desirable airports to accommodate our growing fleet, we may be unable to compete in desirable markets, our aircraft utilization rate could decrease, and we could suffer a material adverse effect on our business, results of operations and financial condition. There can be no assurances that we will be able to grow our business at MSP or in non-MSP markets as we anticipate, or at all.

Our growth is also dependent upon our ability to maintain a safe and secure operation and will require additional personnel, equipment and facilities as we induct new aircraft and continue to execute our growth plan. In addition, we will require additional third-party personnel for services we do not undertake ourselves. An inability to hire and retain personnel, especially in light of the CARES Act limitations, as well as due to high rates of infection among employees, timely secure the required equipment and facilities in a cost-effective manner, efficiently operate our expanded facilities or obtain the necessary regulatory approvals may adversely affect our ability to achieve our growth strategy, which could harm our business. Furthermore, expansion to new

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markets may have other risks due to factors specific to those markets. We may be unable to foresee all of the existing risks upon entering certain new markets or respond adequately to these risks, and our growth strategy and our business may suffer as a result. In addition, our competitors may reduce their fares and/or offer special promotions following our entry into a new market and may also offer more attractive frequent flyer programs and/or access to marketing alliances with other airlines, which we do not currently offer. We cannot assure that we will be able to profitably expand our existing markets or establish new markets.

The COVID-19 pandemic has materially disrupted and continues to disrupt our strategic operating and growth plans in the near-term, and there are risks to our business, operating results, liquidity and financial condition associated with executing our strategic operating and growth plans in the long-term.

The COVID-19 pandemic has materially disrupted and continues to disrupt our strategic operating and growth plans in the near-term, and there are risks to our business, operating results and financial condition associated with executing our strategic operating and growth plans in the long-term. In developing our strategic operating and growth plans, we make certain assumptions, including, but not limited to, those related to customer demand, competition, staffing and hiring, market consolidation, the availability of aircraft and the global economy. Actual economic, market and other conditions have been and may continue to be different from our assumptions. If we do not successfully execute or adjust our strategic operating and growth plans in the long-term, or if actual results continue to vary significantly from our prior assumptions or vary significantly from our future assumptions, our business, operating results and financial condition could be materially and adversely impacted.

Our cargo business is concentrated with Amazon, and any decrease in volumes or increase in costs, or a termination of the ATSA,could have a material adverse effect on our business, operations, financial condition and brand.

For the year ended December 31, 2021, cargo revenue under the ATSA represented 15% of our total operating revenues and our cargo revenue consisted entirely of air cargo transportation services provided to Amazon under the ATSA. The ATSA does not require a minimum amount of flying and Amazon is permitted to decrease flying volume at any time. Our cargo business would decline if Amazon’s use of our cargo services decreases for any reason, including due to general economic conditions or preferences of Amazon and its customers, which a decline would materially adversely affect our business, results of operations, and prospects.

In addition, the profitability of the ATSA is dependent on our ability to manage and accurately predict costs. Our projections of operating costs, crew productivity and maintenance expenses contain key assumptions, including flight hours, aircraft reliability, crewmember productivity, compensation and benefits and maintenance costs. If actual costs are higher than projected or aircraft reliability is less than expected, or aircraft become damaged and are out of revenue service for repair, the profitability of the ATSA and future operating results may be negatively impacted. We rely on flight crews that are unionized. If collective bargaining agreements increase our costs and we cannot recover such increases, our operating results would be negatively impacted. It may be necessary for us to terminate certain customer contracts or curtail planned growth.

Performance under the ATSA is subject to a number of challenges and uncertainties, such as: unforeseen maintenance and other costs; our ability to hire pilots, crew and other personnel necessary to support our CMI services; interruptions in the operations under the ATSA as a result of unexpected or unforeseen events, whether as a result of factors within the Company’s control or outside of the Company’s control; and the level of operations and results of operations, including margins, under the ATSA being less than the Company’s current expectations and projections. The ATSA also contains monthly incentive payments for reaching specific on-time arrival performance thresholds and there are monetary penalties for on-time arrival performance below certain thresholds. As a result, our operating revenues may vary from period to period depending on the achievement of monthly incentives or the imposition of penalties. Further, we could be found in default if we do not maintain certain minimum thresholds over an extended period of time. If we are placed in default due to the failure to maintain reliability thresholds, Amazon may elect to terminate all or part of the services we provide after a cure period and pursue those rights and remedies available to it at law or in equity, in which case the

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2019 Warrants would remain outstanding. Amazon may also terminate the ATSA for convenience, subject to certain notice requirements and payment of a termination fee. The ATSA is also subject to two, two-year extension options, which Amazon may choose not to exercise.

To the extent our volume of flying for Amazon decreases or costs associated with our cargo business increase, or if the ATSA is terminated for any reason, our business, results of operations and financial condition could be materially and adversely affected.

Our low-cost structure is one of our primary competitive advantages, and many factors could affect our ability to control our costs.

Our low-cost structure is one of our primary competitive advantages. However, we have limited control over many of our costs. For example, we have limited control over the price and availability of aircraft fuel, aviation insurance, the acquisition and cost of aircraft, airport and related infrastructure costs, taxes, the cost of meeting changing regulatory requirements, the cost of capable talent at market wages and our cost to access capital or financing. In addition, the compensation and benefit costs applicable to a significant portion of our employees are established by the terms of collective bargaining agreements. See “—Risks Related to Our Business—Increased labor costs, union disputes, employee strikes and other labor-related disruption may adversely affect our business, results of operations and financial condition.” We cannot guarantee we will be able to maintain our relatively low costs. If our cost structure increases and we are no longer able to maintain a competitive cost structure, it could have a material adverse effect on our business, results of operations and financial condition.

Our business is significantly tied to and consolidated in our main hub in Minneapolis-St. Paul, and any decrease in traffic in this hub could have a material adverse effect on our business, operations, financial condition and brand.

Our service is concentrated around our hub in MSP and our business is impacted by economic and geophysical factors of this region. We maintain a large presence in MSP with approximately 89% of 2021 capacity, as measured by ASMs, having MSP as either their origin or destination. Flight operations in Minneapolis can face extreme weather challenges in all seasons, but especially in the winter which at times has resulted in severe disruptions in our operation and the incurrence of material costs as a consequence of such disruptions. Our business could be further harmed by an increase in the amount of direct competition we face in the Minneapolis market or by continued or increased congestion, delays or cancellations. For instance, MSP is also a significant hub for Delta Air Lines. If Delta Air Lines or another legacy network airline were to successfully develop low-cost or low-fare products or if we were to experience increased competition from LCCs or ULCCs in the Minneapolis market, our business, results of operations and prospects could be materially adversely affected.

Our business would also be negatively impacted by any circumstances causing a reduction in demand for air transportation in the Minneapolis area, such as adverse changes in local economic conditions, local regulations and/or mandates, health concerns, adverse weather conditions, negative public perception of Minneapolis, riots, social unrest, terrorist attacks or significant price or tax increases linked to increases in airport access costs and fees imposed on passengers.

We currently operate out of Terminal 2 at MSP. Our access to use our existing gates and other facilities in Terminal 2 is not guaranteed. We cannot assure you that our continued use of our facilities at MSP will occur on acceptable terms with respect to operations and cost of operations, or at all, or that our ongoing use of these facilities will not include additional or increased fees.

Our reputation and business could be adversely affected in the event of an accident or similar public incident involving our aircraft or personnel.

We are exposed to potential significant losses and adverse publicity in the event that any of our aircraft or personnel is involved in an accident, terrorist incident or other similar public incident, which could expose us to significant reputational harm and potential legal liability. In addition, we could face significant costs related to

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repairs or replacement of a damaged aircraft and its temporary or permanent loss from service. Furthermore, our customers, including Amazon, may choose not to use us for their needs following such an incident. We cannot assure you that we will not be affected by such events or that the amount of our insurance coverage will be adequate in the event such circumstances arise and any such event could cause a substantial increase in our insurance premiums. In addition, any future accident or similar incident involving our aircraft or personnel, even if fully covered by insurance or even if it does not involve our airline, may create an adverse public perception about our airline or that the equipment we fly is less safe or reliable than other transportation alternatives, or, in the case of our aircraft, could cause us to perform time-consuming and costly inspections on our aircraft or engines, any of which could have a material adverse effect on our business, results of operations and financial condition.

In addition, any accident involving the Boeing 737-NG or an aircraft similar to the Boeing 737-NG that we operate could result in the curtailment of such aircraft by aviation regulators, manufacturers and other airlines and could create a negative public perception about the safety of our aircraft, any of which could have a material adverse effect on our business, results of operations and financial condition. For example, in 2019, certain global aviation regulators and airlines grounded the Boeing 737 MAX in response to accidents involving aircraft flown by Lion Air and Ethiopian Airlines. In addition, following a 2018 accident involving the failure of a turbofan on a 737-700 aircraft, the National Transportation Safety Board, or NTSB, has recommended that regulators require Boeing to redesign the engine cowl on 737-NG aircraft and retrofit in service 737-NG aircraft with the redesigned cowl. We cannot predict when the FAA will respond to the NTSB recommendations and if it will require us to replace the engine cowls in our aircraft, which may be time-consuming and costly. The resolution of this matter or similar matters in the future could have an impact on our results of operations, financial condition, business and prospects.

Unauthorized use, incursion or breach of our information technology infrastructure, or that of our third party providers, could compromise the personally identifiable information of our passengers, prospective passengers or personnel and other sensitive information and expose us to liability, damage our reputation and have a material adverse effect on our business, results of operations and financial condition.

In the processing of our customer transactions and as part of our ordinary business operations, we and certain of our third-party providers collect, process, transmit and store a large volume of personally identifiable information, including email addresses and home addresses and financial data such as credit and debit card information. This data is increasingly subject to legislation and regulation, such as the Fair Accurate Credit Transparency Act, Payment Card Industry legislation, the California Consumer Privacy Act and the European Union’s General Data Protection Regulation typically intended to protect the privacy of personal data that is collected, processed, stored and transmitted. The security of the systems and network where we and our third-party providers store this data is a critical element of our business, and these systems and our network may be vulnerable to theft, loss, damage and interruption from a number of potential sources and events, including computer viruses, hackers, enemy state actors, denial-of-service attacks, employee theft or misuse, natural or man-made disasters, telecommunications failures, power loss and other disruptive sources and events.

Additionally, any material failure by us or our third-party providers to maintain compliance with the Payment Card Industry security requirements or to rectify a data security issue may result in fines and restrictions on our ability to accept credit and debit cards as a form of payment. Actual or anticipated attacks may cause us to incur increasing costs, including costs to deploy additional personnel and protection technologies, train employees and engage third-party experts and consultants, or costs incurred in connection with the notifications to customers, employees, providers or the general public as part of our notification obligations to the various governments that govern our business. In addition, data and security breaches can also occur as a result of non-technical issues, including breaches by us or by persons with whom we have commercial relationships that result in the unauthorized release of personal or confidential information.

We are subject to increasing legislative, regulatory and customer focus on privacy issues and data security in the United States and abroad. In addition, a number of our commercial partners, including credit card

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companies, have imposed data security standards on us, and these standards continue to evolve. We will continue our efforts to meet our privacy and data security obligations; however, it is possible that certain new obligations may be difficult to meet and could increase our costs. Additionally, we must manage evolving cybersecurity risks. The loss, disclosure, misappropriation of or access to the information of our customers, personnel or business partners or any failure by us to meet our obligations could result in legal claims or proceedings, liability or regulatory penalties.

As the cyber-threat landscape evolves, attacks are growing in frequency, sophistication, and intensity, and are becoming increasingly difficult to detect. We have in the past, and may in the future, experience such cybersecurity threats.

We and the vendors who service us may not have the resources or technical sophistication to anticipate or prevent rapidly evolving types of cyber attacks. Attacks may be targeted at us, our customers (including the U.S. Department of Defense) and our providers, including air navigation service providers, or others who have entrusted us with information, including regulators such as the U.S. Department of Defense, FAA and DOT. In addition, attacks not targeted at us, but targeted solely at providers, may cause disruption to our computer systems or a breach of the data that we maintain on customers, employees, providers and others. Recently, several high profile consumer-oriented companies have experienced significant data breaches, which have caused those companies to suffer substantial financial and reputational harm. We cannot assure you that the precautions we have taken to avoid an unauthorized incursion of our computer systems are either adequate or implemented properly to prevent a data breach and its adverse financial and reputational consequences to our business.

A significant cybersecurity incident could result in a range of potentially material negative consequences for us, including lost revenue; unauthorized access to, disclosure, modification, misuse, loss or destruction of company systems or data; theft of sensitive, regulated or confidential data, such as personal identifying information or our intellectual property; the loss of functionality of critical systems through ransomware, denial of service or other attacks; and business delays, service or system disruptions, damage to equipment and injury to persons or property. The costs and operational consequences of defending against, preparing for, responding to and remediating an incident may be substantial. Further, we could be exposed to litigation, regulatory enforcement or other legal action as a result of an incident, carrying the potential for damages, fines, sanctions or other penalties, as well as injunctive relief requiring costly compliance measures. A cybersecurity incident could also impact our brand, harm our reputation and adversely impact our relationship with our customers, employees and stockholders.

We rely on third-party providers and other commercial partners to perform functions integral to our operations.

We have entered into agreements with third-party providers to furnish certain facilities and services required for our operations, including ground handling, catering, passenger handling, engineering, maintenance, refueling, reservations and airport facilities as well as administrative and support services. We are likely to enter into similar service agreements in new markets we decide to enter, and we cannot assure you that we will be able to obtain the necessary services at acceptable rates, or that such third-party providers will be available to service us.

Although we seek to monitor the performance of third parties that furnish certain facilities or provide us with our ground handling, catering, passenger handling, engineering, maintenance, refueling, reservations and airport facilities, the efficiency, timeliness and quality of contract performance by third-party providers are often beyond our control, and any failure by our third-party providers to perform up to our expectations, or sufficiently staff their operation, may have an adverse impact on our business, reputation with customers, our brand and our operations. These service agreements are generally subject to termination after notice by the third-party providers. In addition, we could experience a significant business disruption if we were to change vendors or if an existing provider ceased to be able to serve us. We expect to be dependent on such third-party arrangements for the foreseeable future.

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We rely on third-party distribution channels to distribute a portion of our airline tickets.

We rely on third-party distribution channels, including those provided by or through global distribution systems, or GDSs, conventional travel agents and online travel agents, or OTAs, to distribute a significant portion of our airline tickets, and we expect in the future to rely on these channels to also collect a portion of our ancillary revenues. These distribution channels are more expensive and at present have less functionality in respect of ancillary revenues than those we operate ourselves, such as our website. Certain of these distribution channels also effectively restrict the manner in which we distribute our products generally. To remain competitive, we will need to successfully manage our distribution costs and rights, and improve the functionality of third-party distribution channels, while maintaining an industry-competitive cost structure. Negotiations with key GDSs and OTAs designed to manage our costs, increase our distribution flexibility, and improve functionality could be contentious, could result in diminished or less favorable distribution of our tickets, and may not provide the functionality we require to maximize ancillary revenues. In addition, in the last several years there has been significant consolidation among GDSs and OTAs. This consolidation and any further consolidation could affect our ability to manage our distribution costs due to a reduction in competition or other industry factors. Any inability to manage such costs, rights and functionality at a competitive level or any material diminishment in the distribution of our tickets could have a material adverse effect on our competitive position and our results of operations. Moreover, our ability to compete in the markets we serve may be threatened by changes in technology or other factors that may make our existing third-party sales channels impractical, uncompetitive or obsolete.

We rely heavily on technology and automated systems to operate our business, and any disruptions or failure of these technologies or systems or any failure on our part to implement any new technologies or systems could materially adversely affect our business.

We are highly dependent on technology and computer systems and networks to operate our business. These technologies and systems include our computerized airline reservation system provided by Navitaire, a unit of Amadeus, flight operations systems, telecommunications systems, mobile phone application, airline website and maintenance systems. In order for our operations to work efficiently, our website and reservation system must be able to accommodate a high volume of traffic, maintain secure information and deliver flight information. Our reservations system, which is hosted and maintained under a long-term contract by a third-party provider, is critical to our ability to issue, track and accept electronic tickets, conduct check-in, board and manage our passengers through the airports we serve and provide us with access to GDSs, which enlarge our pool of potential passengers. There are many instances in the past where a reservations system malfunctioned, whether due to the fault of the system provider or the airline, with a highly adverse effect on the airline’s operations, and such a malfunction has in the past and could in the future occur on our system, or in connection with any system upgrade or migration in the future. We also rely on third-party providers to maintain our flight operations systems, and if those systems are not functioning, we have in the past and may again experience service disruptions, which could result in the loss of important data, increase our expenses, decrease our operational performance and temporarily stall our operations, which may have a materially adverse effect on our business, results of operation, and financial condition.

Any failure of the technologies and systems we use could materially adversely affect our business. In particular, if our reservation system fails or experiences interruptions, and we are unable to book seats for a period of time, we could lose a significant amount of revenue as customers book seats on other airlines, and our reputation could be harmed. Additionally, if our flight systems fail or experience disruption, we could incur costs associated with cancelled and delayed flights. In addition, replacement technologies and systems for any service we currently utilize that experiences failures or interruptions may not be readily available on a timely basis, at competitive rates or at all. Furthermore, our current technologies and systems are heavily integrated with our day-to-day operations and any transition to a new technology or system could be complex and time-consuming. Our technologies and systems cannot be completely protected against events that are beyond our control, including natural disasters, cyber attacks or telecommunications failures. We recently experienced a software outage that resulted in delayed flights for several hours, which could impact our on-time performance and completion factor. Substantial or sustained disruptions or system failures could cause service delays or

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failures and result in our customers purchasing tickets from other airlines. We cannot assure that any of our security measures, change control procedures or disaster recovery plans that we have implemented are adequate to prevent disruptions or failures. In the event that one or more of our primary technology or systems vendors fails to perform and a replacement system is not available or if we fail to implement a replacement system in a timely and efficient manner, our business could be materially adversely affected.

In addition, in the ordinary course of business, our systems will continue to require modification and refinements to address growth and changing business requirements and to enable us to comply with changing regulatory requirements. Modifications and refinements to our systems have been and are expected to continue to be expensive to implement and can divert management’s attention from other matters. Furthermore, our operations could be adversely affected, or we could face impositions of regulatory penalties, if we were unable to timely or effectively modify our systems as necessary or appropriately balance the introduction of new capabilities with the management of existing systems.

We may not be able to grow or maintain our unit revenues or maintain our ancillary revenues.

A key component of our strategy was establishing Sun Country as a premier high-growth, low-cost carrier in the United States by attracting customers with low fares and garnering repeat business by delivering a high-quality customer experience with additional free amenities than traditionally provided on ULCCs in the United States. We intend to continue to differentiate our brand and product in order to expand our loyal customer base and grow or maintain our unit revenues and maintain our ancillary revenues. Differentiating our brand and product has required and will continue to require significant investment, and we cannot assure that the initiatives we have implemented will continue to be successful or that the initiatives we intend to implement will be successful. If we are unable to maintain or further differentiate our brand and product from LCCs or ULCCs, our market share could decline, which could have a material adverse effect on our business, results of operations and financial condition. We may also not be successful in leveraging our brand and product to stimulate new demand with low base fares or gain market share from the legacy network airlines.

In addition, our business strategy includes maintaining our portfolio of desirable, value-oriented, ancillary products and services. However, we cannot assure you that passengers will continue to perceive value in the ancillary products and services we currently offer and regulatory initiatives could adversely affect ancillary revenue opportunities. Failure to maintain our ancillary revenues would have a material adverse effect on our business, results of operations and financial condition. Furthermore, if we are unable to maintain our ancillary revenues, we may not be able to execute our strategy to continue to lower base fares in order to stimulate demand for air travel.

We operate a single aircraft type.

A critical cost-saving element of our business strategy is to operate a single-family aircraft fleet; however, our dependence on the Boeing 737-NG aircraft and CFM56 engines for all of our aircraft makes us vulnerable to any design defects or mechanical problems associated with this aircraft type or these engines. In the event of any actual or suspected design defects or mechanical problems with these family aircraft or engines, whether involving our aircraft or that of another airline, we may choose or be required to suspend or restrict the use of our aircraft. For example, several Boeing 737-NG aircraft have been grounded in the past by other airlines after inspections revealed cracks in the “pickle forks,” a component of the structure connecting the wings to the fuselages. Our business could also be materially adversely affected if the public avoids flying on our aircraft due to an adverse perception of the Boeing 737-NG aircraft or CFM56 engines, whether because of safety concerns or other problems, real or perceived, or in the event of an accident involving such aircraft or engines.

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Increased labor costs, union disputes, employee strikes and other labor-related disruption may adversely affect our business, results of operations and financial condition.

Our business is labor intensive, with labor costs representing approximately 34.5%, 36.9% and 22.6% of our total operating costs for the years ended December 31, 2021, 2020 and 2019, respectively. As of December 31, 2021, approximately 46.3% of our workforce was represented by labor unions. We cannot assure you that our labor costs going forward will remain competitive or that any new agreements into which we enter will not have terms with higher labor costs or that the negotiations of such labor agreements will not result in any work stoppages. In addition, one or more of our competitors may significantly reduce their labor costs, thereby providing them with a competitive advantage over us. New entrants to the market may not have unionized workforces and therefore may have substantially lower costs or better labor efficiencies. Furthermore, our labor costs may increase in connection with our growth, especially if we needed to hire more pilots in order to grow our cargo business. We cannot guarantee that our cargo business will grow and that hiring of additional pilots will be required. We may also become subject to additional collective bargaining agreements in the future as non-unionized workers may unionize.

Relations between air carriers and labor unions in the United States are governed by the Railway Labor Act, or the RLA. Under the RLA, collective bargaining agreements generally contain “amendable dates” rather than expiration dates, and the RLA requires that a carrier maintain the existing terms and conditions of employment following the amendable date through a multi-stage and usually lengthy series of bargaining processes overseen by the National Mediation Board, or the NMB. This process continues until either the parties have reached agreement on a new collective bargaining agreement, or the parties have been released to “self-help” by the NMB. In most circumstances, the RLA prohibits strikes; however, after release by the NMB, carriers and unions are free to engage in self-help measures such as lockouts and strikes.

On December 3, 2019 our dispatchers approved a new contract. The amendable date of the collective bargaining agreement is November 14, 2024. Our collective bargaining agreement with our flight attendants is currently amendable. Negotiations with the union representing this group commenced in November of 2019. By mutual consent, the negotiations were paused in March 2020 due to the COVID-19 pandemic. We restarted negotiations in October of 2021. Our collective bargaining agreement with our pilots is amendable on December 31, 2026. See also “Business—Employees” in this Annual Report. The outcome of our collective bargaining negotiations cannot presently be determined and the terms and conditions of our future collective bargaining agreements may be affected by the results of collective bargaining negotiations at other airlines that may have a greater ability, due to larger scale, greater efficiency or other factors, to bear higher costs than we can. In addition, if we are unable to reach agreement with any of our unionized work groups in current or future negotiations regarding the terms of their collective bargaining agreements, we may be subject to work interruptions, stoppages or shortages. Any such action or other labor dispute with unionized employees could disrupt our operations, reduce our profitability or interfere with the ability of our management to focus on executing our business strategies. As a result, our business, results of operations and financial condition may be materially adversely affected based on the outcome of our negotiations with the unions representing our employees.

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Changes in law, regulation and government policy have affected, and may in the future have a material adverse effect on our business.

Changes in, and uncertainty with respect to, law, regulation and government policy at the local, state or federal level have affected, and may in the future significantly impact, our business and the airline industry. For example, the Tax Cuts and Jobs Act, enacted on December 22, 2017, limits deductions for borrowers for net interest expense on debt. Changes to law, regulations or government policy that could have a material impact on us in the future include, but are not limited to, infrastructure renewal programs; changes to operating and maintenance requirements; foreign and domestic changes in customs, immigration and security policy and requirements that impede travel into or out of the United States; modifications to international trade policy, including withdrawing from trade agreements and imposing tariffs; changes to consumer protection laws; changes to public health policy; changes to financial legislation, including the partial or full repeal of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, or Dodd-Frank Act; public company reporting requirements; environmental regulation and antitrust enforcement. Any such changes could make it more difficult and/or more expensive for us to obtain new aircraft or engines and parts to maintain existing aircraft or engines or make it less profitable or prevent us from flying to or from some of the destinations we currently serve.

To the extent that any such changes have a negative impact on us or the airline industry, including as a result of related uncertainty, these changes may materially and adversely impact our business, financial condition, results of operations and cash flows.

We rely on efficient daily aircraft utilization to address peak demand days of the week and months of the year, which makes us vulnerable to flight delays, flight cancellations or aircraft unavailability during peak demand periods.

We aim to optimize our daily aircraft utilization rate by tailoring service to customer demand patterns, which are seasonal and vary by day of the week. Our average daily aircraft utilization was 6.8 hours, 5.1 hours and 9.6 hours for the years ended December 31, 2021, 2020 and 2019, respectively. Aircraft utilization is block hours divided by number of days in the period divided by average aircraft. Part of our business strategy is to efficiently deploy our aircraft, which is achieved in part by higher utilization during the most profitable seasonal periods and days of the week and more limited usage of less expensive aircraft during weak demand periods. During peak demand periods, we may utilize all of our aircraft, and in the event we experience delays and cancellations from various factors, many of which are beyond our control, including air traffic congestion at airports or other air traffic control problems or outages, adverse weather conditions, increased security measures or breaches in security, international or domestic conflicts, terrorist activity, or other changes in business conditions, because we do not have accommodation arrangements with other airlines like legacy network airlines do and cannot reaccommodate passengers on our aircraft because of our limited schedule, we may incur additional costs in completing customer journeys. Due to the relatively small size of our fleet and the limited and changing nature of our scheduled service and our point-to-point network, the unexpected unavailability of one or more aircraft and resulting reduced capacity could have a material adverse effect on our business, results of operations and financial condition. Additionally, we frequently use all of our freighters in support of our cargo business. In the event we experience a series of aircraft out of service, we would experience a decline in revenue and potentially customer satisfaction. Furthermore, in the event we are unable to procure aircraft at the price-point necessary to allow for lower utilization during weak demand periods, our costs will be higher and could have a material adverse effect on our business, results of operations and financial condition.

The cost of aircraft repairs and unexpected delays in the time required to complete aircraft maintenance could negatively affect our operating results.

We provide flight services throughout the world and could be operating in remote regions. Our aircraft may experience maintenance events in locations that do not have the necessary repair capabilities or are difficult to reach. As a result, we may incur additional expenses and lose billable revenues that we would have otherwise earned. Under certain customer agreements, we are required to provide a spare aircraft while scheduled

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maintenance is completed. If delays occur in the completion of aircraft maintenance, we may incur additional expense to provide airlift capacity and forgo revenues.

If we are unable to attract and retain qualified personnel at reasonable costs or fail to maintain our company culture, our business could be harmed.

Our business is labor intensive. We require large numbers of pilots, flight attendants, maintenance technicians and other personnel. We compete against other U.S. airlines for pilots, mechanics and other skilled labor and certain U.S. airlines offer wage and benefit packages exceeding ours. The airline industry has from time to time experienced a shortage of qualified personnel. In particular, as more pilots in the industry approach mandatory retirement age, or have retired early during the COVID-19 pandemic, the U.S. airline industry may be affected by a pilot shortage. We and other airlines may also face shortages of qualified aircraft mechanics and dispatchers. As is common with most of our competitors, we have faced turnover of our employees. As a result of the foregoing, we may not be able to attract or retain qualified personnel or may be required to increase wages and/or benefits in order to do so. In addition, we may lose employees due to the impact of COVID-19 on aviation or as a result of restrictions imposed under the CARES Act, or other governmental requirements placed on employees, which may further impede our ability to attract and retain skilled labor. If we are unable to hire, train and retain qualified employees, our business could be harmed and we may be unable to implement our growth plans.

In addition, as we hire more people and grow, we believe it may be increasingly challenging to continue to hire people who will maintain our company culture. Our company culture, which we believe is one of our competitive strengths, is important to providing dependable customer service and having a productive, accountable workforce that helps keep our costs low. As we continue to grow, we may be unable to identify, hire or retain enough people who meet the above criteria, including those in management or other key positions. Our company culture could otherwise be adversely affected by our growing operations and geographic diversity. If we fail to maintain the strength of our company culture, our competitive ability and our business, results of operations and financial condition could be harmed.

Our inability to expand or operate reliably or efficiently out of airports where we operate could have a material adverse effect on our business, results of operations and financial condition and brand.

Our results of operations may be affected by actions taken by governmental or other agencies or authorities having jurisdiction over our operations at these airports, including, but not limited to:

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Our business is highly dependent on the availability and cost of airport services at the airports where we operate. Any changes in airport operations could have a material adverse effect on our business, results of operations and financial condition.

We are subject to various environmental and noise laws and regulations, which could have a material adverse effect on our business, results of operations and financial condition.

We are subject to increasingly stringent federal, state, local and foreign laws, regulations and ordinances relating to the protection of the environment and noise, including those relating to emissions to the air (including air emissions associated with the operation of our aircraft), discharges (including storm water discharges) to surface and subsurface waters, safe drinking water and the use, management, disposal and release of, and exposure to, hazardous substances, oils and waste materials. We are or may be subject to new or amended laws and regulations that may have a direct effect (or indirect effect through our third-party providers, including the petroleum industry, or airport facilities at which we operate) on our operations. In addition, U.S. airport authorities are exploring ways to limit de-icing fluid discharges. Any such existing, future, new or potential laws and regulations could have an adverse impact on our business, results of operations and financial condition.

Similarly, we are subject to environmental laws and regulations that require us to investigate and remediate soil or groundwater to meet certain remediation standards. Under certain laws current and former owners or operators of facilities, as well as generators of waste materials disposed of at such facilities, can be subject to liability for investigation and remediation costs at facilities that have been identified as requiring response actions. Liability under these laws may be strict, joint and several, meaning that we could be liable for the costs of cleaning up environmental contamination regardless of fault or compliance with applicable law when the disposal occurred or the amount of wastes directly attributable to us.

In addition, the ICAO and jurisdictions around the world have adopted noise regulations that require all aircraft to comply with noise level standards, and governmental authorities in several U.S. and foreign cities are considering or have already implemented aircraft noise reduction programs, including the imposition of overnight curfews and limitations on daytime take-offs and landings. Compliance with existing and future environmental laws and regulations, including emissions limitations and more restrictive or widespread noise regulations, that may be applicable to us could require significant expenditures, increase our cost base and have a material adverse effect on our business, results of operations and financial condition, and violations thereof can lead to significant fines and penalties, among other sanctions.

We participate with other airlines in fuel consortia and fuel committees at our airports where economically beneficial, which agreements generally include cost-sharing provisions and environmental indemnities that are generally joint and several among the participating airlines. Any costs (including remediation and spill response costs) incurred by such fuel consortia could also have an adverse impact on our business, results of operations and financial condition.

Our intellectual property rights, particularly our branding rights, are valuable, and any inability to protect them may adversely affect our business and financial results.

We consider our intellectual property rights, particularly our branding rights such as our trademarks applicable to our airline and Sun Country Rewards program, to be a significant and valuable aspect of our business. We aim to protect our intellectual property rights through a combination of trademark, copyright and other forms of legal protection, contractual agreements and policing of third-party misuses of our intellectual property, but cannot guarantee that such efforts will be successful. Our failure to obtain or adequately protect our intellectual property or any change in law that lessens or removes the current legal protections of our intellectual property

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may diminish our competitiveness and adversely affect our business and financial results. Any litigation or disputes regarding intellectual property may be costly and time-consuming and may divert the attention of our management and key personnel from our business operations, either of which may adversely affect our business and financial results.

Negative publicity regarding our customer service could have a material adverse effect on our business, results of operations and financial condition.

Our business strategy includes the differentiation of our brand and product from the other U.S. airlines, including LCCs and ULCCs, in order to increase customer loyalty and drive future ticket sales. We intend to accomplish this by continuing to offer passengers dependable customer service. However, in the past, we have experienced customer complaints related to, among other things, product and pricing changes related to our business strategy and customer service. In particular, we have generally experienced a higher volume of complaints when we implemented changes to our unbundling policies, such as charging for seats and baggage. These complaints, together with reports of lost baggage, delayed and cancelled flights, and other service issues, are reported to the public by the DOT. In addition, we could become subject to complaints about our booking practices. Finally, we have experienced a significant number of complaints, including letters from lawmakers and attorneys general, concerning non-refundable tickets during the COVID-19 pandemic. If we do not meet our customers’ expectations with respect to reliability and service, our brand and product could be negatively impacted, which could result in customers deciding not to fly with us and adversely affect our business and reputation. We have agreements for bus and car service to transport passengers to our MSP hub. If these operators suffer a service problem, safety failure or accident, our brand would be negatively impacted.

Our reputation and brand could be harmed if we were to experience significant negative publicity, including through social media.

We operate in a public-facing industry with significant exposure to social media. Negative publicity, whether or not justified, can spread rapidly through social media. In particular, passengers can use social media to portray interactions with Sun Country, without context, in a manner that can be quickly and broadly disseminated. To the extent that we are unable to respond timely and appropriately to negative publicity, our reputation and brand can be harmed. Damage to our overall reputation and brand could have a negative impact on our financial results.

We are highly dependent upon our cash balances, operating cash flows and availability under our Credit Facilities.

Our principal sources of liquidity are cash and cash equivalents and availability under our $25,000 Revolving Credit Facility and $90,000 Delayed Draw Term Loan Facility. Our Delayed Draw Term Loan Facility is available only to finance the acquisition of aircraft and engines and is not available for working capital or other general corporate purposes. In 2021, we borrowed $80,500 under the Delayed Draw Term Loan Facility for the purpose of financing the acquisition of six additional aircraft that we previously leased, all of which have been acquired. We are and will continue to be dependent on our operating cash flows and cash balances to fund our operations, provide capital reserves and make scheduled payments on our aircraft-related fixed obligations. If our operating cash flows become insufficient to cover the entirety of our cash outflows, the Revolving Credit Facility may not be adequate to finance our operations. If we fail to generate sufficient funds from operations to meet our operating cash requirements or do not have access to availability under the Revolving Credit Facility, or other sources of borrowings or equity financing, we could default on our operating leases and fixed obligations. Our inability to meet our obligations as they become due would have a material adverse effect on our business, results of operations and financial condition.

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Our liquidity would be adversely impacted, potentially materially, in the event one or more of our credit card processors were to impose holdback restrictions for payments due to us from credit card transactions.

We currently have agreements with organizations that process credit card transactions arising from purchases of air travel tickets by our customers. Credit card processors may have financial risk associated with tickets purchased for travel which can occur several weeks or months after the purchase. As of December 31, 2021, we were not subject to any credit card holdbacks under our credit card processing agreements, although if we fail to meet certain liquidity and other financial covenants, our credit card processors have the right to hold back credit card remittances to cover our obligations to them. If our credit card processors were to impose holdback restrictions on us, the negative impact on our liquidity could be significant which could have a material adverse effect on our business, results of operations and financial condition.

Our ability to obtain financing or access capital markets may be limited.

We have significant obligations related to leases and debt financing for our aircraft fleet and may incur additional obligations as we grow our operations, and our current strategy is to rely on lessors or access to capital markets to provide financing for our aircraft acquisition needs. There are a number of factors that may affect our ability to raise financing or access the capital markets in the future, including our liquidity and credit status, our operating cash flows, market conditions in the airline industry, U.S. and global economic conditions, the general state of the capital markets and the financial position of the major providers of commercial aircraft financing. We cannot assure you that we will be able to source external financing for our planned aircraft acquisitions or for other significant capital needs, and if we are unable to source financing on acceptable terms, or unable to source financing at all, our business could be materially adversely affected. To the extent we finance our activities with additional debt, we may become subject to financial and other covenants that may restrict our ability to pursue our business strategy or otherwise constrain our growth and operations.

Our maintenance costs will fluctuate over time; additionally we will periodically incur substantial maintenance costs due to the maintenance schedules of our aircraft fleet and obligations to the lessors, and we could incur significant maintenance expenses outside of such maintenance schedules in the future.

We have substantial maintenance expense obligations, including with respect to our aircraft operating leases. Prior to an aircraft being returned in connection with an operating lease, we will incur costs to restore these aircraft to the condition required by the terms of the underlying operating leases. The amount and timing of these so-called “return conditions” costs can prove unpredictable due to uncertainty regarding the maintenance status of each particular aircraft at the time it is to be returned and it is not unusual for disagreements to ensue between the airline and the leasing company as to the required redelivery conditions on a given aircraft or engine.

Outside of scheduled maintenance, we incur from time to time unscheduled maintenance which is not forecast in our operating plan or financial forecasts, and which can impose material unplanned costs and the loss of flight equipment from revenue service for a significant period of time. For example, a single unplanned engine event can require a shop visit costing several million dollars and cause the engine to be out of service for a number of weeks.

Furthermore, the terms of our lease agreements require us to pay maintenance reserves to the lessor in advance of the performance of major maintenance, resulting in our recording significant prepaid deposits on our balance sheet, and there are restrictions on the extent to which such maintenance reserves are available for reimbursement. In addition, the terms of any lease agreements that we enter into in the future could also require maintenance reserves in excess of our current requirements. Any significant increase in maintenance and repair expenses would have a material adverse effect on our business, results of operations and financial condition. Please see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Operating Expenses—Maintenance.”

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We have a significant amount of aircraft and other fixed obligations that could impair our liquidity and thereby harm our business, results of operations and financial condition.

The airline business is capital intensive. As of December 31, 2021, our 36 passenger aircraft fleet consisted of six aircraft financed under operating leases, nine aircraft financed under finance leases and nineteen aircraft financed under secured debt arrangements or owned outright. As of December 31, 2021, we had future operating lease obligations of $81,900, future debt principal obligations of $280,931, and future finance lease obligations of $250,654. During 2022, based on our aircraft leases and debt structure as of December 31, 2021, we expect to make payments of $20,541 related to operating leases, $30,367 related to debt principal obligations and $23,052 related to finance lease obligations. Additionally, we made payments for maintenance reserves of $15,073 for 2021 and expect to make significant payments for maintenance reserves in the future. Our ability to pay the fixed costs associated with our contractual obligations will depend on our operating performance, cash flow, availability under the Revolving Credit Facility and our ability to secure adequate future financing, which will in turn depend on, among other things, the success of our current business strategy and our future financial and operating performance, competitive conditions, fuel price volatility, any significant weakening or improving in the U.S. economy, availability and cost of financing, as well as general economic and political conditions and other factors that are, to some extent, beyond our control. The amount of our aircraft-related fixed obligations could have a material adverse effect on our business, results of operations and financial condition and could:

There can be no assurance that we will be able to obtain sufficient funds to enable us to repay or refinance our debt obligations on commercially reasonable terms, or at all. A failure to pay our operating lease, debt and other fixed cost obligations or a breach of our contractual obligations, including the Credit Agreement, could result in a variety of adverse consequences, including the exercise of remedies by our creditors and lessors. In such a situation, it is unlikely that we would be able to cure our breach, fulfill our obligations, make required lease payments or otherwise cover our fixed costs and our secured lenders could foreclose against the assets securing the indebtedness owing to them, which would have a material adverse effect on our business, results of operations and financial condition.

We depend on a sole-source supplier for the majority of our aircraft parts and any supply disruption could have a material adverse effect on our business.

We have entered into a contract with Delta Air Lines, Inc., or Delta, one of our competitors that is also the largest airline operating at MSP, for the vast majority of our aircraft parts. We are vulnerable to any problems associated with the performance of Delta’s obligations to supply our aircraft parts, including design defects,

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mechanical problems and regulatory issues associated with engines and other parts. If Delta experiences a significant business challenge, disruption or failure due to issues such as financial difficulties or bankruptcy, regulatory or quality compliance issues, or other financial, legal, regulatory or reputational issues, ceases to produce our aircraft parts, is unable to effectively deliver our aircraft parts on timelines and at the prices we have negotiated, or terminates the contract, we would incur substantial transition costs and we would lose the cost benefits from our current arrangement with Delta, which would have a material adverse effect on our business, results of operations and financial condition.

Reduction in demand for air transportation, or governmental reduction or limitation of operating capacity, in the domestic United States, Canada, Mexico or Caribbean markets, or a reduction in demand for our charter or cargo operations, could harm our business, results of operations and financial condition.

A significant portion of our operations are conducted to and from the domestic United States, Canada, Mexico or Caribbean markets. Our business, results of operations and financial condition could be harmed if we lose our authority to fly to these markets, by any circumstances causing a reduction in demand for air transportation, or by governmental reduction or limitation of operating capacity, in these markets, such as adverse changes in local economic or political conditions, public health restrictions, including testing or vaccination requirements associated with COVID-19, negative public perception of these destinations, unfavorable weather conditions, public health concerns, civil unrest, violence or terrorist-related activities. Furthermore, our business could be harmed if jurisdictions that currently limit competition allow additional airlines to compete on routes we serve. In addition, a reduction in demand from our charter customers, including as a result of decreased U.S. Department of Defense troop movements or fewer sports events and related travel, or from Amazon under the ATSA could have a material and adverse effect on our business, results of operations and financial condition.

We are subject to extensive regulation by the FAA, the DOT, the TSA, CBP and other U.S. and foreign governmental agencies, compliance with which could cause us to incur increased costs and adversely affect our business, results of operations and financial condition.

Airlines are subject to extensive regulatory and legal compliance requirements, both domestically and internationally, that impose significant costs. In the last several years, Congress has passed laws and the FAA, DOT and TSA have issued regulations, orders, rulings and guidance relating to consumer protections and to the operation, safety, and security of airlines that have required significant expenditures. We expect to continue to incur expenses in connection with complying with such laws and government regulations, orders, rulings and guidance. Additional laws, regulations, taxes and increased airport rates and charges have been proposed from time to time that could significantly increase the cost of airline operations or reduce the demand for air travel. For example, the FAA Reauthorization Act of 2018 directed the FAA to issue rules establishing minimum dimensions for passenger seats, including seat pitch, width and length. If adopted, these measures could have the effect of raising ticket prices, reducing revenue, and increasing costs.

For example, the DOT has broad authority over airlines and their consumer and competitive practices, and has used this authority to issue numerous regulations and pursue enforcement actions, including rules and fines relating to the handling of lengthy tarmac delays, consumer notice requirements, consumer complaints, price and airline advertising, distribution, oversales and involuntary denied boarding process and compensation, ticket refunds, liability for loss, delay or damage to baggage, customer service commitments, contracts of carriage and the transportation of passengers with disabilities. Among these is the series of Enhanced Airline Passenger Protection rules issued by the DOT. In addition, the adoption of FAR Part 117 in 2014 modified required pilot rest periods and work hours and Congress has enacted a law and the FAA issued regulations requiring U.S. airline pilots to have a minimum number of hours as a pilot in order to qualify for an Air Transport Pilot certificate which all pilots on U.S. airlines must obtain. Furthermore, in October 2018, Congress passed the FAA Reauthorization Act of 2018, which extends FAA funds through fiscal year 2023. The legislation contains provisions which could have effects on our results of operations and financial condition. Among other provisions, the new law requires the DOT to clarify that, with respect to a passenger who is involuntarily denied boarding as a result of an oversold flight, there is no maximum level of compensation an air carrier may pay to

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such passenger and the compensation levels set forth in the regulations are the minimum levels of compensation an air carrier must pay to such a passenger, and to create new requirements for the treatment of disabled passengers. In addition it provides that the maximum civil penalty amount for damage to wheelchairs and other mobility aids or for injuring a disabled passenger may be trebled. The FAA must issue rules establishing minimum dimensions for passenger seats, including seat pitch, width and length. The FAA Reauthorization Act of 2018 also establishes new rest requirements for flight attendants and requires, within one year, that the FAA issue an order requiring installation of a secondary cockpit barrier on each new aircraft. The FAA Reauthorization Act of 2018 also provides for several other new requirements and rulemakings related to airlines, including but not limited to: (i) prohibition on voice communication cell phone use during certain flights, (ii) insecticide use disclosures, (iii) new training policy best practices for training regarding racial, ethnic, and religious non-discrimination, (iv) training on human trafficking for certain staff, (v) departure gate stroller check-in, (vi) the protection of pets on airplanes and service animal standards, (vii) requirements to refund promptly to passengers any ancillary fees paid for services not received, (viii) consumer complaint process improvements, (ix) pregnant passenger assistance, (x) restrictions on the ability to deny a revenue passenger permission to board or involuntarily remove such passenger from the aircraft, (xi) minimum customer service standards for large ticket agents, (xii) information publishing requirements for widespread disruptions and passenger rights, (xiii) submission of plans pertaining to employee and contractor training consistent with the Airline Passengers with Disabilities Bill of Rights, (xiv) ensuring assistance for passengers with disabilities, (xv) flight attendant duty period limitations and rest requirements, including submission of a fatigue risk management plan, (xvi) submission of policy concerning passenger sexual misconduct and (xvii) development of Employee Assault Prevention and Response Plan related to the customer service agents. Furthermore, in September 2019, the FAA published an Advance Notice of Proposed Rulemaking regarding flight attendant duty period limitations and rest requirements. The DOT also published a Notice of Proposed Rulemaking in January 2020 regarding, for example, the accessibility features of lavatories and onboard wheelchair requirements on certain single-aisle aircraft with an FAA certificated maximum capacity of 125 seats or more, training flight attendants to proficiency on an annual basis to provide assistance in transporting qualified individuals with disabilities to and from the lavatory from the aircraft seat, and providing certain information on request to qualified individuals with a disability or persons inquiring on their behalf, on the carrier’s website, and in printed or electronic form on the aircraft concerning the accessibility of aircraft lavatories. The DOT also recently published Final Rules regarding traveling by air with service animals and defining unfair or deceptive practices. The DOT also recently published a Final Rule clarifying that the maximum amount of denied boarding compensation that a carrier may provide to a passenger denied boarding involuntarily is not limited, prohibiting airlines from involuntarily denying boarding to a passenger after the passenger’s boarding pass has been collected or scanned and the passenger has boarded (subject to safety and security exceptions), raising the liability limits for denied boarding compensation, and raising the liability limit for mishandled baggage in domestic air transportation. Failure to remain in full compliance with these rules may subject us to fines or other enforcement action. FAR Part 117 and the minimum pilot hour requirements may also reduce our ability to meet flight crew staffing requirements.

We cannot assure you that compliance with these and other laws, regulations, orders, rulings and guidance will not have a material adverse effect on our business, results of operations and financial condition.

Compliance with the laws, regulations, orders, rulings and guidance applicable to the airline industry may increase our costs, which could have a material adverse effect on our business. For example, if our current standards do not meet the FAA’s rules regarding minimum dimensions for passenger seats, the number of seats on our aircraft would be reduced and our operating costs would increase.

In addition, the TSA imposes security procedures and requirements on U.S. airports and airlines serving U.S. airports, some of which are funded by a security fee imposed on passengers and collected by airlines, which impedes our ability to stimulate demand through low fares. We cannot forecast what additional security and safety requirements may be imposed in the future or the costs or revenue impact that would be associated with complying with such requirements.

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Furthermore, the DoD continues to issue new IT systems security requirements which require expenditures in order to bring our systems into compliance. The DoD also recently issued a vaccination mandate that may impact our ability to hire and maintain staffing.

Our ability to operate as an airline is dependent on our obtaining and maintaining authorizations issued to us by the DOT and the FAA. The FAA has the authority to issue mandatory orders relating to, among other things, operating aircraft, the grounding of aircraft, maintenance and inspection of aircraft, installation of new safety-related items, and removal and replacement of aircraft parts that have failed or may fail in the future. A decision by the FAA to ground, or require time-consuming inspections of or maintenance on, our aircraft, for any reason, could negatively affect our business, results of operations and financial condition. Federal law requires that air carriers operating scheduled service be continuously “fit, willing and able” to provide the services for which they are licensed. Our “fitness” is monitored by the DOT, which considers managerial competence, operations, finances, and compliance record. In addition, under federal law, we must be a U.S. citizen (as determined under applicable law). Please see “Business—Foreign Ownership.” While the DOT has seldom revoked a carrier’s certification for lack of fitness, such an occurrence would render it impossible for us to continue operating as an airline. The DOT may also institute investigations or administrative proceedings against airlines for violations of regulations.

International routes are regulated by air transport agreements and related agreements between the United States and foreign governments. Our ability to operate international routes is subject to change because the applicable agreements between the United States and foreign governments may be amended from time to time. Our access to new international markets may be limited by the applicable air transport agreements between the United States and foreign governments and our ability to obtain the necessary authority from the United States and foreign governments to fly the international routes. In addition, our operations in foreign countries are subject to regulation by foreign governments and our business may be affected by changes in law and future actions taken by such governments, including granting or withdrawal of government approvals and airport slots and restrictions on competitive practices. We are subject to numerous foreign regulations in the countries outside the United States where we currently provide service. If we are not able to comply with this complex regulatory regime, our business could be significantly harmed. Please see “Business—Government Regulation.”

Our business could be materially adversely affected if we lose the services of our key personnel.

Our success depends to a significant extent upon the efforts and abilities of our senior management team and key financial and operating personnel. In particular, we depend on the services of our senior management team, particularly Jude Bricker, our Chief Executive Officer, and Dave Davis, our President and Chief Financial Officer. The CARES Act places limitations on pay for these key positions. Competition for highly qualified personnel is intense, and the loss of any executive officer, senior manager, or other key employee without adequate replacement or the inability to attract new qualified personnel could have a material adverse effect on our business, results of operations and financial condition. We do not maintain key-man life insurance on our management team.

The requirements of being a public company may strain our resources, divert management’s attention and affect our ability to attract and retain qualified board members or executive officers.

As a public company, we will incur significant legal, accounting and other expenses that we did not incur as a private company, including costs associated with public company reporting requirements and maintaining liability insurance for our directors and officers, which have increased in recent years. We also have incurred and will incur costs associated with the Sarbanes-Oxley Act of 2002, as amended, or the Sarbanes-Oxley Act, the Dodd-Frank Act, related rules implemented or to be implemented by the Securities and Exchange Commission, or the SEC, and Nasdaq’s listing rules. The expenses incurred by public companies generally for reporting and corporate governance purposes have been increasing. We expect these rules and regulations to increase our legal and financial compliance costs and to make some activities more time-consuming and costly, although we are currently unable to estimate these costs with any degree of certainty. These laws and

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regulations could also make it more costly for us to obtain certain types of insurance, including director and officer liability insurance, and we may be forced to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. These laws and regulations could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors or our board committees or as our executive officers and may divert management’s attention. Furthermore, if we are unable to satisfy our obligations as a public company, our common stock could be delisted, and we could be subject to fines, sanctions and other regulatory action and potentially civil litigation.

Our quarterly results of operations fluctuate due to a number of factors, including seasonality.

We expect our quarterly results of operations to continue to fluctuate due to a number of factors, including our seasonal operations, competitive responses in key locations or routes, price changes in aircraft fuel and the timing and amount of maintenance expenses. As a result of these and other factors, quarter-to-quarter comparisons of our results of operations and comparisons of our key operating statistics may not be reliable indicators of our future performance. Seasonality may cause our quarterly results to fluctuate since historically our passengers tend to fly more during the winter months and less in the summer and fall months. We cannot assure you that we will find profitable markets in which to operate during the off-peak season. Lower demand for air travel during the fall and other off-peak months could have a material adverse effect on our business, results of operations and financial condition. We may not realize any or all of our estimated cost savings, which would have a negative effect on our results of operations.

As part of our business strategy, we expect to implement certain operational improvements and cost savings initiatives. Any cost savings that we realize from such efforts may differ materially from our estimates. Our estimates are the current estimates of the Company, but they involve risks, uncertainties, assumptions and other factors that may cause actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by such estimates. In addition, any cost savings that we realize may be offset, in whole or in part, by reductions in revenues, or through increases in other expenses. Any one-time costs incurred to achieve our cost savings going forward may be more than we expect and, to achieve additional cost savings, we may need to incur additional one-time costs. Our operational improvements and cost savings plans are subject to numerous risks and uncertainties that may change at any time. We cannot assure you that our initiatives will be completed as anticipated or that the benefits we expect will be achieved on a timely basis or at all. The future performance of the Company may differ significantly from the anticipated performance of the Company.

We may become involved in litigation that may materially adversely affect us.

From time to time, we may become involved in various legal proceedings relating to matters incidental to the ordinary course of our business, including commercial, employment, class action, whistleblower, patent, product liability and other litigation and claims, and governmental and other regulatory investigations and proceedings. In particular, in recent years, there has been significant litigation in the United States and abroad involving airline consumer complaints. We have in the past faced, and may face in the future, claims by third parties that we have violated a passenger’s rights. Such matters can be time-consuming, divert management’s attention and resources, cause us to incur significant expenses or liability and/or require us to change our business practices. Because of the potential risks, expenses and uncertainties of litigation, we may, from time to time, settle disputes, even where we believe that we have meritorious claims or defenses. Because litigation is inherently unpredictable, we cannot assure you that the results of any of these actions will not have a material adverse effect on our business, results of operations and financial condition.

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Risks Related to Our Indebtedness

The Credit Agreement contains restrictions that limit our flexibility.

The Credit Agreement contains, and any future indebtedness of ours could also contain, a number of covenants that impose significant operating and financial restrictions on us, including restrictions on our and our subsidiaries’ ability to, among other things:

As a result of these covenants, we will be limited in the manner in which we conduct our business, and we may be unable to engage in favorable business activities or finance future operations or capital needs. These restrictive covenants may limit our ability to engage in activities that may be in our long-term best interest. The failure to comply with those covenants could result in an event of default which, if not cured or waived, could result in the acceleration of a substantial amount of our indebtedness.

Our Delayed Draw Term Loan Facility is available solely to finance the acquisition of aircraft and engines and is not available for working capital or other general corporate purposes. As a result, only the $25,000 Revolving Credit Facility portion of the Credit Facilities may be available for general corporate purposes and as a general source of liquidity.

We are subject to certain restrictions on our business as a result of our participation in governmental programs under the CARES Act and we may be subject to similar or other restrictions pursuant to future governmental programs.

Under the Payroll Support Program, the Treasury provided us an aggregate of $62,312 in Payroll Support Payments from April 21, 2020 to October 1, 2020, and an additional $37,040 in grants during the first half of 2021 (collectively, the “Payroll Support Payments”). Further, we were notified on April 15, 2021 that we would receive a grant of $34,547 under Payroll Support Program 3, which was received during April and May 2021. Additionally, on October 26, 2020, we entered into the CARES Act Loan Agreement with the Treasury under the aviation direct loan program of the CARES Act. Pursuant to the CARES Act Loan Agreement, the Treasury agreed to extend loans to us in an aggregate principal amount of $45,000, subject to specified terms, which was due to be repaid on the earlier of (i) October 24, 2025 or (ii) six months prior to the expiration date of any

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material loyalty program securing the loan. See Notes 3 and 8 to our audited consolidated financial statements included herein for more information.

In accordance with any grants and/or loans received under the CARES Act, we are required to comply with the relevant provisions of the CARES Act and the related implementing agreements which, among other things, include the following: the requirement to use the Payroll Support Payments exclusively for the continuation of payment of crewmember and employee wages, salaries and benefits; the requirement that certain levels of commercial air service be maintained until March 1, 2022, if ordered by the DOT; the prohibitions on share repurchases of listed securities and the payment of common stock (or equivalent) dividends until September 30, 2022; and restrictions on the payment of certain executive compensation until April 1, 2023. We used a portion of the net proceeds from our initial public offering to repay in full all amounts outstanding under the CARES Act Loan on March 24, 2021.

The substance and duration of restrictions to which we are subject under the grants and/or loans under the CARES Act, including, but not limited to, those outlined above, will materially affect our operations, and we may not be successful in managing these impacts. Further, these restrictions could limit our ability to take actions that we otherwise might have determined to be in the best interests of our company and our stockholders. In particular, limitations on executive compensation may impact our ability to retain senior management or other key employees during this critical time.

We cannot predict whether the assistance under any of these programs will be adequate to support our business for the duration of the COVID-19 pandemic or whether additional assistance will be required or available in the future. Future governmental programs in which we participate may include similar or other restrictions on the operation of our business. There can be no assurances that additional grants will be available or that we will qualify for future programs.

Risks Related to Ownership of Our Common Stock

Our stock price may fluctuate significantly.

The market price of our common stock could vary significantly as a result of a number of factors, some of which are beyond our control.

The following factors could affect our stock price:

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The stock markets in general have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the trading price of our common stock. Securities class action litigation has often been instituted against companies following periods of volatility in the overall market and in the market price of a company’s securities. Such litigation, if instituted against us, could result in very substantial costs, divert our management’s attention and resources and harm our business, financial condition, and results of operations.

We are an “emerging growth company,” and will be able to take advantage of reduced disclosure requirements applicable to “emerging growth companies,” which could make our common stock less attractive to investors.

We are an “emerging growth company,” as defined in the JOBS Act, and, for as long as we continue to be an “emerging growth company,” we intend to take advantage of certain exemptions from various reporting requirements applicable to other public companies but not to “emerging growth companies.” These exemptions include not being required to comply with the auditor attestation requirements of Section 404(b) of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a non-binding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. We could be an “emerging growth company” until the earliest of (i) the last day of the first fiscal year in which our annual gross revenues exceed $1.07 billion, (ii) the date that we become a “large accelerated filer” as defined in Rule 12b-2 under the Exchange Act, which would occur at the end of our most recently completed fiscal year if the market value of our common stock that is held by non-affiliates exceeds $700 million as of the last business day of our most recently completed second fiscal quarter, we have been required to file annual and quarterly report under the Exchange Act for a period of at least 12 months and we have filed at least one annual report pursuant to the Exchange Act, (iii) the last day of our fiscal year ending December 31, 2026, and (iv) the date on which we have issued more than $1 billion in non-convertible debt during the preceding three-year period. We cannot predict if investors will find our common stock less attractive if we choose to rely on these exemptions. If some investors find our common stock less attractive as a result of any choices to reduce future disclosure, there may be a less active trading market for our common stock and our stock price may decline or become more volatile and it may be difficult for us to raise additional capital if and when we need it.

We will incur significant costs and devote substantial management time as a result of operating as a public company, particularly after we are no longer an “emerging growth company.”

As a public company, we have and will continue to incur significant legal, accounting and other expenses. For example, we are required to comply with the requirements of Section 404(a) of the Sarbanes-Oxley Act and

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the Dodd-Frank Act, as well as rules and regulations subsequently implemented by the SEC and heightened auditing standards, and Nasdaq, our stock exchange, including the establishment and maintenance of effective disclosure and financial controls and changes in corporate governance practices. The rules governing management’s assessment of our internal control over financial reporting are complex and require significant documentation, testing and possible remediation. Compliance with these requirements will increase our legal and financial compliance costs and will make some activities more time consuming and costly. In addition, our management and other personnel may need to divert attention from operational and other business matters to devote substantial time to these public company requirements. In particular, we expect to continue incurring significant expenses and devote substantial management effort toward ensuring compliance with the requirements of the Sarbanes-Oxley Act. In that regard, we may need to hire additional accounting and financial staff with appropriate public company experience and technical accounting knowledge. Furthermore, if we fail to achieve and maintain an effective internal control environment, we could suffer material misstatements in our consolidated financial statements and fail in meeting our reporting obligations, which would likely cause investors to lose confidence in our reported financial information. Additionally, ineffective internal control over financial reporting could expose us to increased risk of fraud or misuse of corporate assets and subject us to potential delisting from Nasdaq, regulatory investigations, civil or criminal sanctions and litigation, any of which would have a material and adverse effect on our business, results of operations and financial condition.

However, for as long as we remain an “emerging growth company” as defined in the JOBS Act, we intend to take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not “emerging growth companies” including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404(b) of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a non-binding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved.

Under the JOBS Act, “emerging growth companies” can delay adopting new or revised accounting standards until such time as those standards apply to private companies.

After we are no longer an “emerging growth company,” we expect to incur additional management time and cost to comply with the more stringent reporting requirements applicable to companies that are deemed accelerated filers or large accelerated filers, including complying with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act.

We cannot predict or estimate the amount of additional costs we may incur as a result of becoming a public company or the timing and materiality of such costs.

We are continuing to improve our internal control over financial reporting.

Our independent registered public accounting firm is not required to audit the effectiveness of our internal control over financial reporting until after we are no longer an “emerging growth company,” as defined in the JOBS Act, which at the latest would be the end of the fiscal year ending December 31, 2026. At such time, our internal control over financial reporting may be insufficiently documented, designed or operating, which may cause our independent registered public accounting firm to issue a report that is adverse.

Our certificate of incorporation and bylaws include provisions limiting ownership and voting by non-U.S. citizens.

To comply with restrictions imposed by federal law on foreign ownership and control of U.S. airlines, our certificate of incorporation and bylaws restrict ownership and control of shares of our common stock by non-U.S. citizens. The restrictions imposed by federal law and DOT policy require that we be owned and controlled by U.S. citizens, that no more than 25% of our voting stock be owned or controlled, directly or indirectly, by persons or entities who are not U.S. citizens, as defined in 49 U.S.C. § 40102(a)(15), that no more than 49% of our stock be owned or controlled, directly or indirectly, by persons or entities who are not U.S. citizens and

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are from countries that have entered into “open skies” air transport agreements with the United States, that our president and at least two-thirds of the members of our Board of Directors and other managing officers be U.S. citizens and that we be under the actual control of U.S. citizens. Our certificate of incorporation and bylaws provide that the failure of non-U.S. citizens to register their shares on a separate stock record, which we refer to as the “foreign stock record,” would result in a loss of their voting rights in the event and to the extent that the aggregate foreign ownership of the outstanding common stock exceeds the foreign ownership restrictions imposed by federal law. Our bylaws further provide that no shares of our common stock will be registered on the foreign stock record if the amount so registered would exceed the foreign ownership restrictions imposed by federal law. If it is determined that the amount registered in the foreign stock record exceeds the foreign ownership restrictions imposed by federal law, shares will be removed from the foreign stock record, resulting in the loss of voting rights, in reverse chronological order based on the date of registration therein, until the number of shares registered therein does not exceed the foreign ownership restrictions imposed by federal law.

The restrictions on ownership and control of shares of our common stock could adversely impact the price that investors might be willing to pay in the future for shares of our common stock.

The Apollo Stockholder has significant influence over us, and Apollo’s interests may conflict with our interests and the interests of other stockholders.

As of December 31, 2021, the Apollo Stockholder beneficially owned approximately 43% of the voting power of our outstanding common equity. Although the Apollo Stockholder beneficially owns less than 50% of our outstanding common equity, individuals affiliated with Apollo continue to have significant influence over the outcome of votes on all matters requiring approval by our stockholders, including the election of directors, entering into significant corporate transactions such as mergers, tender offers, and the sale of all or substantially all of our assets and issuance of additional debt or equity. The interests of Apollo and its affiliates, including the Apollo Funds and the Apollo Stockholder, could conflict with or differ from our interests or the interests of our other stockholders. For example, the concentration of ownership held by the Apollo Stockholder could delay, defer, or prevent a change in control of our company or impede a merger, takeover, or other business combination which may otherwise be favorable for us. Additionally, Apollo and its affiliates are in the business of making investments in companies and may, from time to time, acquire and hold interests in or provide advice to businesses that compete directly or indirectly with us, or are suppliers or customers of ours. Apollo and its affiliates may also pursue acquisition opportunities that may be complementary to our business, and as a result, those acquisition opportunities may not be available to us. Any such investment may increase the potential for the conflicts of interest discussed in this risk factor. So long as the Apollo Stockholder continues to directly or indirectly beneficially own a significant amount of our equity, even if such amount is less than 50%, the Apollo Stockholder will continue to be able to substantially influence or effectively control our ability to enter into corporate transactions. The Apollo Stockholder also has a right to nominate a number of directors comprising a percentage of our board of directors in accordance with Apollo and its affiliates’ beneficial ownership of the voting power of our outstanding common stock (rounded up to the nearest whole number).

Although we are no longer a “controlled company” within the meaning of Nasdaq’s rules, during a one-year transition period, we may continue to rely on exemptions from certain corporate governance requirements.

As of October 19, 2021, the Apollo Stockholder no longer controlled a majority of the voting power of our outstanding voting stock and, as a result, we ceased to be a “controlled company” within the meaning of Nasdaq’s corporate governance standards. As a result, we are subject to additional corporate governance requirements, including the requirements that:

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The Nasdaq rules provide for phase-in periods for these requirements (including that each such committee consist of a majority of independent directors within 90 days of no longer being a “controlled company”), but we must be fully compliant with the requirements within one year of the date on which we cease to be a “controlled company.” We currently do not have a majority of independent directors on our board of directors, but two of the three members of each of our nominating and corporate governance committee and our compensation committee are independent. All three members of our audit committee are independent directors. During this transition period, our stockholders may not have the same protections afforded to stockholders of companies that are subject to all of the Nasdaq corporate governance requirements and the ability of our independent directors to influence our business policies and affairs may be reduced. In addition, we may not be able to attract and retain the number of independent directors needed to comply with Nasdaq rules during the transition period.

We are a holding company and rely on dividends, distributions, and other payments, advances, and transfers of funds from our subsidiaries to meet our obligations.

We are a holding company that does not conduct any business operations of our own. As a result, we are largely dependent upon cash dividends and distributions and other transfers, including for payments in respect of our indebtedness, from our subsidiaries to meet our obligations. The agreements governing the indebtedness of our subsidiaries, including the CARES Act and the Credit Agreement, impose restrictions on our subsidiaries’ ability to pay dividends or other distributions to us. Each of our subsidiaries is a distinct legal entity, and under certain circumstances legal and contractual restrictions may limit our ability to obtain cash from them and we may be limited in our ability to cause any future joint ventures to distribute their earnings to us. The deterioration of the earnings from, or other available assets of, our subsidiaries for any reason could also limit or impair their ability to pay dividends or other distributions to us.

Our future earnings and earnings per share, as reported under GAAP, could be adversely impacted by the warrants granted to Amazon. If Amazon exercises its right to acquire shares of our common stock pursuant to the 2019 Warrants, this will dilute the ownership interests of our then-existing stockholders and could adversely affect the market price of our common stock.

The warrants granted to Amazon in 2019 increase the number of diluted shares reported, which has an effect on our diluted earnings per share to the extent the warrants actually vest. The warrants have an exercise price of approximately $15.17 per share, approximately 17.3% of which had vested as of December 31, 2021. A portion of the 2019 Warrants will vest incrementally based on aggregate global payments by Amazon to the Company or its affiliates pursuant to the ATSA. In addition, vesting can occur immediately in certain circumstances, including upon a change of control (as defined in the 2019 Warrant) or certain transfers of 30% or more of the voting power in the Company to a new person or group (other than any equity offering by the Company or the Apollo Stockholder pursuant to an effective registration statement so long as no person or group (within the meaning of the Exchange Act) acquires more than 50% of the voting power of the Company in such offering). If additional 2019 Warrants vest and Amazon exercises its right to acquire shares of our common stock pursuant to the 2019 Warrants, it will dilute the ownership interests of our then-existing stockholders and reduce our earnings per share. In addition, to the extent the common stock issued upon exercise of the 2019 Warrants is transferred to non-U.S. citizens, it will further limit the amount of our common stock that may be owned or controlled by other non-U.S. citizens. Furthermore, any sales in the public market of any common stock issuable upon the exercise of the 2019 Warrants could adversely affect prevailing market prices of our common stock.

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Future sales of our common stock in the public market, or the perception in the public market that such sales may occur, could reduce our stock price.

As of December 31, 2021, we had 57,872,452 shares of common stock outstanding, warrants to purchase 9,482,606 shares of common stock outstanding, options to purchase 5,290,714 shares of common stock outstanding and 4,679 shares of common stock that may be issued upon the vesting of outstanding restricted stock units. In addition, certain of our existing stockholders, including the Apollo Stockholder and Amazon, have certain rights to require us to register the sale of common stock held by them including in connection with underwritten offerings. Additionally, we filed a registration statement in respect of all shares of common stock that we may issue under the Omnibus Incentive Plan and the SCA Acquisition Equity Plan. After registration, these shares can be freely sold in the public market upon issuance. Sales of significant amounts of stock in the public market upon expiration of lock-up agreements, the perception that such sales may occur, or early release of any lock-up agreements, could adversely affect prevailing market prices of our common stock or make it more difficult to sell shares of common stock at a time and price that you deem appropriate.

We do not anticipate paying dividends on our common stock in the foreseeable future.

We do not anticipate paying any dividends in the foreseeable future on our common stock. We intend to retain all future earnings for the operation and expansion of our business and the repayment of outstanding debt. The CARES Act and the Credit Agreement contain, and any future indebtedness likely will contain, restrictive covenants that impose significant operating and financial restrictions on us, including restrictions on our ability to pay dividends and make other restricted payments. As a result, capital appreciation, if any, of our common stock may be the major source of gain for the foreseeable future. While we may change this policy at some point in the future, we cannot assure that we will make such a change.

We are required to pay our pre-IPO stockholders for certain tax benefits, and the amounts of such payments could be material.

We entered into an income tax receivable agreement with our pre-IPO stockholders that provides for the payment by us to our pre-IPO stockholders of 85% of the amount of cash savings, if any, in U.S. federal, foreign, state and local income tax that we and our subsidiaries actually realize for periods starting at least 12 months after the closing date of our initial public offering as a result of the utilization of tax attributes existing at the time of our initial public offering.

These tax attributes include net operating loss carryforwards, deductions, tax basis and certain other tax attributes, in each case that relate to periods (or portions thereof) ending on or prior to the closing date of our initial public offering.

We expect that the payments we make under the income tax receivable agreement could be material. Assuming no material changes in the relevant tax law, and that we and our subsidiaries earn sufficient income to realize the full tax benefits subject to the income tax receivable agreement, we expect that future payments under the income tax receivable agreement will aggregate to be approximately $98,800 as of December 31, 2021. Payments in accordance with the terms of the income tax receivable agreement could have an adverse effect on our liquidity and financial condition.

In addition, under some circumstances, including certain mergers, asset sales and other transactions constituting a “change of control” under the income tax receivable agreement or if we breach our obligations thereunder, the income tax receivable agreement will terminate and we will be required to make a payment equal to the present value of future payments under the income tax receivable agreement, which payment will be calculated based on certain assumptions, including those relating to our and our subsidiaries’ future taxable income. In these situations, our obligations under the income tax receivable agreement could have a material and adverse impact on our liquidity and could have the effect of delaying, deferring or preventing certain mergers, asset sales or other “change of control” transactions.

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To the extent that we are unable to make payments under the income tax receivable agreement for any reason, such payments will be deferred and will accrue interest until paid, which could adversely affect our results of operations and could also affect our liquidity in periods in which such payments are made.

For more information on the income tax receivable agreement, see Note 13 to our Consolidated Financial Statements.

ITEM 1B: UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES

Aircraft Fleet

We fly only Boeing 737-NG aircraft, which we believe provides us significant operational and cost advantages compared to airlines that operate multiple fleet types. Flight crews are interchangeable across all of our aircraft, and maintenance, spare parts inventories and other operational support are highly simplified relative to more complex fleets. With the addition of CMI services, we expect that these efficiencies will remain intact.

As of December 31, 2021, we operated a fleet of 36 Boeing 737-NG passenger aircraft, consisting of 35 Boeing 737-800s and one Boeing 737-700. Of these aircraft, fifteen were financed under operating or finance leases as of December 31, 2021. Of the remaining passenger aircraft, 13 were owned and financed through an Enhanced Equipment Trust Certificate (“EETC”) financing structure, six are owned and financed through our Delayed Draw Term Loan Facility, and two are owned outright. The average age of the passenger aircraft in our fleet was approximately fifteen years as of December 31, 2021. The 2019-1 EETC was used to convert a portion of our leased aircraft to owned aircraft, as well as refinance some of our previously owned passenger aircraft during the fourth quarter of 2019 and first half of 2020. Due to this, the EETC reduced our financing costs. None of our aircraft leases are scheduled to expire prior to 2024. Our current fleet plan calls for growth to an estimated 50 passenger aircraft by the end of 2023.

We also operate 12 737-NG freighters dedicated to our cargo business. These freighters had an average age of nineteen years as of December 31, 2021. This fleet of freighters is subleased directly from Amazon and we operate them pursuant to the ATSA. Based upon review of the ATSA, the sublease arrangement does not qualify as a lease under ASC 842, Leases, because we do not control the use of the aircraft. As such, no right-of-use asset and lease liability is recognized in our financial statements for the Amazon arrangement. We may expand our freighter fleet in order to serve additional cargo customers or provide additional service to Amazon.

Facilities

In most of the airports we serve, we do not directly lease facilities, but rather operate under flexible common use agreements. This facilitates our strategy of entering and exiting markets to service periods of peak demand. Our terminal passenger service facilities, which include ticket counters, gate space, operational support space and baggage service offices, generally have month-to-month terms or are used on a per use basis. For any leased space we are typically responsible for maintenance, insurance and other facility-related expenses and services under these agreements. We also have entered into use agreements at many of the airports we serve that provide for the non-exclusive use of runways, taxiways and other facilities. Landing fees under these agreements are based on the number of landings and weight of the aircraft.

We primarily operate out of eight of 14 gates at Terminal 2 at MSP, five of which are assigned to us on a priority basis with common use access to the remaining gates. Our leases for our terminal passenger service facilities, which include operational support space and baggage service offices, are leased on a month-to-month basis.

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Gate space and ticket counter space is used and billed on a per operation (each arrival and departure) basis until an annual operating cap is met. Our leases also include two hangars:

For charter service with an origin or destination where we do not have ground handling capabilities, we arrange with airports, fixed base operators or military bases to provide ground services on an as needed basis.

Our principal executive offices and headquarters are presently located on MSP property at 2005 Cargo Road, Minneapolis, Minnesota 55450, consisting of approximately 90,000 square feet, under a lease which expires in February 2029.

ITEM 3: LEGAL PROCEEDINGS

We are subject to commercial litigation claims and to administrative and regulatory proceedings and reviews that may be asserted or maintained from time to time. We currently believe that the ultimate outcome of such lawsuits, proceedings and reviews will not, individually or in the aggregate, have a material adverse effect on our financial position, liquidity or results of operations.

ITEM 4: MINE SAFETY DISCLOSURES

Not applicable.

PART II

ITEM 5: MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES AND EQUITY SECURITIES

Market Information

On March 17, 2021, our common stock began trading on the Nasdaq Global Select Market (“Nasdaq”) under the symbol “SNCY”. Prior to that date, there was no public market for our common stock. On December 31, 2021, the closing price of our common stock was $27.25. The following table shows the high and low closing per share prices for our common stock for the periods indicated:

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As of December 31, 2021, there were 57,872,452 shares of common stock outstanding and held of record by 12 stockholders and no shares of preferred stock were outstanding. The number of record holders of our common stock does not include Depository Trust Company (DTC) participants or beneficial owners holding shares through nominee names. Refer to Note 1 - Company Background for additional information on the Initial Public Offering of Common Stock and Other Stock Sales that occurred during 2021.

Dividend Policy

We have not to date paid any cash dividends on our common stock and we currently do not intend to pay cash dividends on our common stock in the foreseeable future. However, we may, in the future, decide to pay

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dividends on our common stock. Any declaration and payment of cash dividends in the future, if any, will be at the discretion of our board of directors and will depend upon such factors as earnings levels, cash flows, capital requirements, levels of indebtedness, restrictions imposed by applicable law, our overall financial condition, restrictions in our debt agreements, and any other factors deemed relevant by our board of directors.

As a holding company, our ability to pay dividends also depends on our receipt of cash dividends from our operating subsidiaries. Our ability to pay dividends will therefore be restricted as a result of restrictions on their ability to pay dividends to us under the CARES Act and the Credit Agreement and may be restricted under future indebtedness that we or they may incur.

Use of Proceeds

The Registration Statement on Form S-1 (File No. 333-252858) for our initial public offering (“IPO”) of our common stock, par value $0.01 per share was declared effective by the SEC on March 16, 2021, pursuant to which we issued and sold 10,454,545 shares of our common stock at $24.00 per share, which included 1,363,636 shares issued upon the exercise of the underwriters’ over-allotment option to purchase additional shares. We received net proceeds of $225,329 after deducting underwriting discounts and commissions, and other offering expenses. The managing underwriters for our IPO were Barclays Capital Inc. and Morgan Stanley & Co. LLC. Shares of our common stock began trading on the NASDAQ on March 17, 2021. We used $46,260 of the net proceeds to repay all amounts outstanding under the CARES Act Loan and the remainder was used for general corporate purposes, including the acquisition of additional aircraft.

Securities Authorized for Issuance under Equity Compensation Plans

The Company has 3,600,000 shares authorized under the Sun Country Airlines Holdings, Inc. 2021 Omnibus Incentive Plan, of which 3,434,074 remains available as of December 31, 2021. Refer to Note 10 – Stock-Based Compensation for additional information on the compensation plans.

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Purchases of Equity Security by the Issuer and Affiliated Purchasers

The Company does not have a share repurchase program and no shares were repurchased during the year ended December 31, 2021. Under the CARES Act, we are restricted from conducting certain share repurchases through September 30, 2022.

Stock Performance Graph

The following graph compares the cumulative total return from March 17, 2021 through December 31, 2021 on our common stock with the cumulative total return on the NASDAQ Composite Index and the NYSE ARCA

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Revenue Recognition - Scheduled passenger service, charter service, and most ancillary revenues are recognized when the passenger flight occurs. Revenues exclude amounts collected on behalf of other parties, including transportation taxes.

The Company initially defers ticket sales as an air traffic liability and recognizes revenue when the passenger flight occurs. Unused non-refundable tickets expire at the date of scheduled travel and are recorded as revenue unless the customer notifies the Company in advance of such date that the customer will not travel. If notification is made, a travel credit is created for the face value less applicable change fees. Travel credits may generally be redeemed toward future travel for up to 12 months after the date of the original booking. A portion of travel credits will expire unused. The Company records an estimate for travel credits that will expire unused in passenger revenue. These estimates are based on historical experience of travel credit activity and consider other facts, such as recent program changes and modifications that could affect the ultimate usage patterns of tickets and travel credits.

Ancillary revenue for baggage fees, seat selection fees, and on-board sales is recognized when the associated flight occurs. Revenue for change fees is deferred and recognized when the passenger travel is provided. Fees received in advance of the flight date are initially recorded as an air traffic liability.

Charter revenue is recognized at the time of departure when transportation is provided.

Cargo revenue is typically recognized based on hours flown, number of flights, and the amount of aircraft resources provided during a reporting period. Pursuant to ASC 606, Revenue from Contracts with Customers,

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cash flow models, quoted market values and third-party independent appraisals, as considered necessary. No impairment losses were recognized during the years ended December 31, 2021, 2020 or 2019.

Valuation of the TRA Liability - The TRA liability is an estimate based on, among other things, (i) generation of future taxable income over the term of the TRA, (ii) the Company’s participation in future government programs, (iii) stock option activity during periods prior to the commencement of payments under the TRA and (iv) future changes in tax laws. These factors could result in an increase or decrease in the related liability which would be recognized in the Company’s earnings in the period of such change.

The following discussion and analysis presents factors that had a material effect on our results of operations during the years ended December 31, 2021, 2020 and 2019. Also discussed is our financial position as of December 31, 2021 and 2020. This section should be read in conjunction with our consolidated financial statements and related notes appearing elsewhere in this Annual Report on Form 10-K. This discussion contains forward-looking statements that involve risk, assumptions and uncertainties, such as statements of our plans, objectives, expectations, intentions and forecasts. Our actual results and the timing of selected events could differ materially from those discussed in these forward-looking statements as a result of several factors, including those set forth under the section of this report titled “Risk Factors” “Cautionary Note Regarding Forward-Looking Statements” and elsewhere in this report. The “Risk Factors” and the “Cautionary Note Regarding Forward-Looking Statements” should be read carefully to gain an understanding of the important factors that could cause actual results to differ materially from our forward-looking statements.

Business Overview

Sun Country is a new breed of hybrid low-cost air carrier that dynamically deploys shared resources across our synergistic scheduled service, charter, and cargo businesses. By doing so, we believe we are able to generate high growth, high margins and strong cash flows with greater resilience than other passenger airlines. We focus

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ability to pass through certain costs, including fuel. Our diverse charter customer base includes casino operators, the U.S. Department of Defense, college, and professional sports teams. We are the leading charter airline for college sports including the National Collegiate Athletic Association (“NCAA”) Championships (notably “March Madness”) as well as individual team travel. In fiscal year 2021, we flew 153 college sports teams, which was lower than 2019 due to impacts of the COVID-19 pandemic. Our charter business includes ad hoc, repeat, short-term and long-term service contracts with pass through fuel arrangements and annual rate escalations. Most of our business is non-cyclical because the U.S. Department of Defense and sports teams still fly during normal economic downturns and our casino contracts are long-term in nature.

On December 13, 2019, we signed the ATSA with Amazon to provide air cargo services. Flying under the ATSA began in May 2020 and we are currently flying 12 Boeing 737-800 cargo aircraft for Amazon. Our CMI service is asset-light from a Sun Country perspective as Amazon supplies the aircraft and covers many of the operating expenses, including fuel, and provides all cargo loading and unloading services. We are responsible for flying the aircraft under our air carrier certificate, crew, aircraft line maintenance and insurance, all of which allow us to leverage our existing operational expertise from our scheduled service and charter businesses. Our cargo business also enables us to leverage certain assets, capabilities, and fixed costs to enhance profitability and promote growth across our Company.

Operations in Review

We believe a key component of our success is establishing Sun Country as a high growth, low-cost carrier in the United States by attracting customers with low fares and garnering repeat business by delivering a high-quality passenger experience, offering state-of-the-art interiors, free streaming of in-flight entertainment to passenger devices, seat reclining and seat-back power in all of our aircraft.

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Ancillary. Ancillary revenue consists of revenue generated from air travel-related services such as baggage fees, seat selection and upgrade fees, itinerary service fees and on-board sales.

Cargo. Cargo revenue consists of air cargo transportation services under the ATSA with Amazon, primarily related to e-commerce delivery services.

Other. Other revenue consists primarily of revenue from services in connection with our Sun Country Vacations products, including organizing ground services, such as hotel, car and transfers. Other revenue also includes services not directly related to providing passenger services such as the advertising, marketing and brand elements resulting from our co-branded credit card program. This component of our revenues also includes revenue from mail on regularly scheduled passenger aircraft.

Operating Expenses

Aircraft Fuel. Aircraft fuel expense includes jet fuel, federal and state taxes, other fees and the mark-to-market gains and losses associated with our fuel derivative contracts since we do not apply hedge accounting. Aircraft fuel expense can be volatile, even between quarters, due to price changes and mark-to-market gains and losses in the value of the underlying derivative instruments as crude oil prices and refining margins increase or decrease.

Salaries, Wages, and Benefits. Salaries, wages, and benefits expense includes salaries, hourly wages, bonuses, equity-based compensation, and profit sharing paid to employees for their services, as well as related expenses associated with medical benefits, employee benefit plans, employer payroll taxes and other employee related costs.

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finite-lived intangible assets. It also includes the depreciation of significant maintenance expenses deferred under the built-in overhaul method for owned and certain finance leased aircraft.

Ground Handling. Ground handling includes ground services at airports including baggage handling, ticket counter and other ground services.

Landing Fees and Airport Rent. Landing fees and airport rent includes aircraft landing fees and charges for the use of airport facilities.

Special Items, net. Special items, net reflects expenses, or credits to expense, that are not representative of our ongoing costs for the period presented and may vary from period to period in nature, frequency and amount.

Other Operating. Other operating expenses include crew and other employee travel, interrupted trip expenses, information technology, property taxes and insurance, including hull-liability insurance, supplies, legal and other professional fees, facilities and all other administrative and operational overhead expenses.