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REVENUE (Tables) | 6 Months Ended
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Jun. 30, 2025
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Passenger revenue recognized in the unaudited condensed consolidated statements of operations:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Passenger ticket revenue, net of taxes and fees | $ | 2,832 |  |  | $ | 2,226 |  |  | $ | 5,184 |  |  | $ | 3,874 |
Passenger ancillary revenue | 162 |  |  | 135 |  |  | 302 |  |  | 243 |
Loyalty program passenger revenue | 361 |  |  | 290 |  |  | 677 |  |  | 538 |
Total Passenger revenue | $ | 3,355 |  |  | $ | 2,651 |  |  | $ | 6,163 |  |  | $ | 4,655 |
The table below presents the Company's passenger revenue by principal geographic region (as defined by the U.S. Department of Transportation):
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Domestic | $ | 3,061 |  |  | $ | 2,490 |  |  | $ | 5,523 |  |  | $ | 4,295 |
Latin America | 166 |  |  | 161 |  |  | 380 |  |  | 360 |
Pacific | 128 |  |  | — |  |  | 260 |  |  | — |
Total Passenger revenue | $ | 3,355 |  |  | $ | 2,651 |  |  | $ | 6,163 |  |  | $ | 4,655 |
Loyalty program revenue included in the unaudited condensed consolidated statements of operations:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Loyalty program passenger revenue | $ | 361 |  |  | $ | 290 |  |  | $ | 677 |  |  | $ | 538 |
Loyalty program other revenue | 210 |  |  | 174 |  |  | 417 |  |  | 338 |
Total Loyalty program revenue | $ | 571 |  |  | $ | 464 |  |  | $ | 1,094 |  |  | $ | 876 |
Cargo and other revenue included in the unaudited condensed consolidated statements of operations:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Cargo revenue | $ | 67 |  |  | $ | 36 |  |  | $ | 124 |  |  | $ | 64 |
Other revenue | 72 |  |  | 36 |  |  | 137 |  |  | 72 |
Total Cargo and other revenue | $ | 139 |  |  | $ | 72 |  |  | $ | 261 |  |  | $ | 136 |
Contract with Customer, Asset and Liability | The table below presents a roll forward of the total loyalty program liability:
| Six Months Ended June 30,
(in millions) | 2025 |  | 2024
Total Deferred Revenue balance at January 1 | $ | 3,256 |  |  | $ | 2,603 |
Travel miles and companion certificate redemption - Passenger revenue | (655) |  |  | (508) |
Miles redeemed on partner airlines - Loyalty program other revenue | (119) |  |  | (67) |
Increase in liability for mileage credits issued | 990 |  |  | 613 |
Total Deferred Revenue balance at June 30 | $ | 3,472 |  |  | $ | 2,641 |

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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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