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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Passenger Revenue | The following table provides the components of Passenger revenue recognized for the three and nine months ended September 30, 2025 and 2024:
| Three months ended September 30, |  | Nine months ended September 30,
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Passenger non-loyalty | $ | 4,896 |  |  | $ | 5,092 |  |  | $ | 15,110 |  |  | $ | 15,316 |
Passenger loyalty - air transportation | 805 |  |  | 896 |  |  | 2,475 |  |  | 2,589 |
Passenger ancillary sold separately | 612 |  |  | 262 |  |  | 1,166 |  |  | 768 |
Total passenger revenues | $ | 6,313 |  |  | $ | 6,250 |  |  | $ | 18,751 |  |  | $ | 18,673 |
Schedule of Rollforward of Air Traffic Liability | As of September 30, 2025, and December 31, 2024, the components of Air traffic liability, including contract liabilities based on tickets sold and unused flight credits available to the Customer, both of which are net of recorded breakage, and loyalty points available for redemption, within the unaudited Condensed Consolidated Balance Sheet were as follows:
| Balance as of
(in millions) | September 30, 2025 |  | December 31, 2024
Air traffic liability - passenger travel and ancillary passenger services | $ | 3,620 |  |  | $ | 3,393 |
Air traffic liability - loyalty program | 4,505 |  |  | 4,849 |
Total Air traffic liability | $ | 8,125 |  |  | $ | 8,242 |
Rollforwards of the Company's Air traffic liability - loyalty program for the three and nine months ended September 30, 2025 and 2024 were as follows:
| Three months ended September 30, |  | Nine months ended September 30,
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Air traffic liability - loyalty program - beginning balance | $ | 4,693 |  |  | $ | 4,962 |  |  | 4,849 |  |  | $ | 4,916 |
Amounts deferred associated with points awarded | 649 |  |  | 851 |  |  | 2,214 |  |  | 2,645 |
Revenue recognized from points redeemed - Passenger | (805) |  |  | (896) |  |  | (2,475) |  |  | (2,589) |
Revenue recognized from points redeemed - Other | (32) |  |  | (31) |  |  | (83) |  |  | (86) |
Air traffic liability - loyalty program - ending balance | $ | 4,505 |  |  | $ | 4,886 |  |  | $ | 4,505 |  |  | $ | 4,886 |
Rollforwards of the amounts included in Air traffic liability as of September 30, 2025 and 2024 were as follows:
| Nine months ended September 30,
(in millions) | 2025 |  | 2024
Air traffic liability - beginning balance | $ | 8,242 |  |  | $ | 8,279 |
Current period sales (a) | 18,496 |  |  | 19,181 |
Revenue from amounts included in contract liability opening balances | (4,634) |  |  | (4,593) |
Revenue from current period sales | (13,979) |  |  | (14,167) |
Air traffic liability - ending balance | $ | 8,125 |  |  | $ | 8,700 |
(a)Current period sales include passenger travel, ancillary services, flight loyalty, and partner loyalty

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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