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Revenue Recognition
 9 Months Ended
Sep. 30, 2026
Revenue Recognition [Abstract]  
Revenue Recognition Revenue Recognition
Passenger Revenue

Passenger revenue is the most significant category in the Company's reported operating revenues, as outlined below:
Three Months Ended September 30,Nine Months Ended September 30,
(in thousands)2026202520262025
Scheduled service$387,182 $177,194 $1,136,942 $707,771 
Ancillary air-related charges372,776 295,548 1,075,965 963,700 
Loyalty redemptions17,490 21,402 58,832 57,331 
Total passenger revenue$777,448 $494,144 $2,271,739 $1,728,802 

Sales of passenger tickets not yet flown are recorded in air traffic liability. As of September 30, 2026, the air traffic liability balance was $632.5 million, of which approximately $587.7 million was related to forward bookings, with the remaining $44.8 million related to credit vouchers for future travel.

The normal contract term of passenger tickets is 12 months and passenger revenue associated with future travel will principally be recognized within this time frame. Of the $363.3 million that was recorded in the air traffic liability balance as of December 31, 2025, substantially all was recognized into passenger revenue during the nine months ended September 30, 2026. The amount recognized in 2026 from the prior year-end air traffic liability balance does not include Sun Country passenger revenue as air traffic liability attributable to Sun Country was not included in the Company's prior year-end balance.

The Company periodically evaluates the estimated amount of credit vouchers expected to expire unused and any adjustment is removed from air traffic liability and included in passenger revenue in the period in which the evaluation is complete.
Contract Assets

The Company's contract assets primarily relate to unamortized costs incurred by Sun Country to prepare the Amazon cargo aircraft for service, as well as the value of the Amazon warrants that is amortized against cargo revenue over the remaining term of the ATSA. The balances as of September 30, 2026, which are approximately $33.1 million, are included in prepaid expenses and other current assets and deposits and other assets on the Condensed Consolidated Balance Sheet.
Loyalty redemptions

In connection with Allegiant's co-brand credit card program and Allways Rewards® loyalty program, as well as Sun Country's co-brand credit card program and the Sun Country Rewards loyalty program, the Company has a performance obligation to its members to honor future travel award redemptions. The accounting for and recognition of the loyalty program redemptions are discussed in the Summary of Significant Accounting Policies in the Company's annual 10-K filing.

The following table presents the activity of the co-brand credit cards and the loyalty programs as of the dates indicated:
Nine Months Ended September 30,
(in thousands)20262025
Balance at January 1$77,632 $80,711 
Points acquired from Sun Country as of May 1314,385 — 
Points awarded (deferral of revenue)(1)
65,312 58,560 
Points redeemed (recognition of revenue)(1)(2)
(59,408)(57,280)
Balance at September 30(3)
$97,921 $81,991 
(1)Includes issuance and redemption of Sun Country Rewards loyalty points after May 13, 2026.
(2)Revenue recognized from points redeemed includes points issued under the respective loyalty programs during the period and points that were included in the loyalty program liability at the beginning of the period. Allegiant's and Sun Country's loyalty programs are administered and accounted for separately.
(3) The current portion of the loyalty program liability represents the estimate of revenue to be recognized in the next 12 months based on historical trends, with the remaining balance reflected in noncurrent liabilities expected to be recognized into revenue in periods thereafter.

In October 2026, the Company entered into an addendum to the Affinity Agreement (the “Agreement”) with Bank of America, N.A. The Agreement extends the term through 2036 and modifies certain other terms. The Company will continue to allocate consideration received under the Agreement to the separately identifiable performance obligations using the estimated selling price allocation methodology described in the Summary of Significant Accounting Policies in the Company’s Annual Report on Form 10-K.
Third Party Products Revenue

Third party products revenue primarily includes revenue associated with Allegiant and Sun Country's loyalty programs, which is comprised of the marketing component of point sales to the co-brand credit card provider and other marketing related payments. Third party products revenue totaled $78.7 million and $60.3 million for the nine months ended September 30, 2026 and 2025, respectively. The accounting and recognition of marketing services related to Allegiant's loyalty program are discussed in the Summary of Significant Accounting Policies in the Company's annual 10-K filing. The remaining amounts included within third party products revenue relate mostly to sales of travel insurance, hotel rooms, rental cars and ticket attractions.
Resort Revenue

The sale of Sunseeker Resort was completed on September 4, 2025. As such, only the revenues during the three and nine months ended September 30, 2025 are presented in the table below:

(in thousands)Three Months Ended September 30, 2025Nine Months Ended September 30, 2025
Rooms$4,009 $28,172 
Food and beverage3,553 21,280 
Other1,796 11,228 
Total resort revenue$9,358 $60,680 
Revenue from banquets, golf, retail, and spa services was included in other resort revenue. Resort revenue was recognized as the underlying services or goods were provided, with minimal timing differences between service delivery and payment.