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LEASES (Tables) | 12 Months Ended
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Dec. 31, 2024
Leases [Abstract] |
Assets And Liabilities, Lessee | Lease-related assets and liabilities recorded on the consolidated balance sheet was as follows:
(in millions) | Balance Sheet Presentation | 2024 |  | 2023
Assets |  |  |  |
Operating lease assets | Operating lease assets | $ | 1,296 |  |  | $ | 1,195 |
Finance lease assets | Property and equipment, net | 53 |  |  | — |
Total lease assets |  | $ | 1,349 |  |  | $ | 1,195 |
Liabilities |  |  |  |
Current |  |  |  |
Operating | Current portion of operating lease liabilities | $ | 207 |  |  | $ | 158 |
Finance | Current portion of finance lease liabilities | 8 |  |  | 64 |
Noncurrent |  |  |  |
Operating | Operating lease liabilities, net of current portion | 1,198 |  |  | 1,125 |
Finance | Finance lease liabilities, net of current portion | 47 |  |  | — |
Total lease liabilities |  | $ | 1,460 |  |  | $ | 1,347 |
Weighted-average remaining lease term (in years) |  |  |  |
Operating leases |  | 8.9 |  | 9.6
Finance leases |  | 6.5 |  | 0
Weighted-average discount rate |  |  |  |
Operating leases |  | 6.4 | % |  | 6.2 | %
Finance leases |  | 6.3 | % |  | — | %
Lease, Cost | The components of lease expense for operating and finance leases were as follows:
(in millions) |  | 2024 |  | 2023 |  | 2022
Expense |  |  |  |  |  |
Operating lease cost(a) |  | $ | 217 |  |  | $ | 218 |  |  | $ | 290 |
Amortization of finance lease assets |  | 2 |  |  | — |  |  | — |
Interest on finance lease liabilities |  | 1 |  |  | — |  |  | — |
Variable and short-term lease costs(a) |  | 557 |  |  | 472 |  |  | 418 |
Total lease expense |  | 777 |  |  | 690 |  |  | 708 |
Revenue |  |  |  |  |  |
Lease revenue(b) |  | (15) |  |  | (15) |  |  | (15) |
Net lease impact |  | $ | 762 |  |  | $ | 675 |  |  | $ | 693 |
The cash paid for leases was as follows:
(in millions) | 2024 |  | 2023 |  | 2022
Operating cash flows for operating leases | 241 |  |  | 348 |  |  | 354 |
Financing cash flows for finance leases(a) | 31 |  |  | 211 |  |  | — |
(a) Primarily consists of payments made for A321neo finance leases, with associated expenses recognized within Special items - operating in the consolidated statements of operations.
Finance Lease, Liability, to be Paid, Maturity | Future minimum lease payments under non-cancellable leases as of December 31, 2024:
| Operating Leases |  | Finance Leases
(in millions) | Aircraft(a) |  | Other |  | Aircraft(a) |  | Other
2025 | $ | 258 |  |  | $ | 28 |  |  | $ | 11 |  |  | $ | — |
2026 | 248 |  |  | 26 |  |  | 11 |  |  | — |
2027 | 219 |  |  | 20 |  |  | 11 |  |  | — |
2028 | 199 |  |  | 18 |  |  | 11 |  |  | — |
2029 | 183 |  |  | 15 |  |  | 11 |  |  | — |
Thereafter | 449 |  |  | 215 |  |  | 6 |  |  | 7 |
Total Lease Payments(a) | 1,556 |  |  | 322 |  |  | 61 |  |  | 7 |
Less: Imputed interest | (301) |  |  | (154) |  |  | (9) |  |  | (4) |
Total | $ | 1,255 |  |  | $ | 168 |  |  | $ | 52 |  |  | $ | 3 |
(a) Future minimum lease payments in the table reflect incentive credits related to leased B737-9 aircraft. As a result, the operating lease liabilities presented on the consolidated balance sheet will not agree to this table.
Lessee, Operating Lease, Liability, Maturity | Future minimum lease payments under non-cancellable leases as of December 31, 2024:
| Operating Leases |  | Finance Leases
(in millions) | Aircraft(a) |  | Other |  | Aircraft(a) |  | Other
2025 | $ | 258 |  |  | $ | 28 |  |  | $ | 11 |  |  | $ | — |
2026 | 248 |  |  | 26 |  |  | 11 |  |  | — |
2027 | 219 |  |  | 20 |  |  | 11 |  |  | — |
2028 | 199 |  |  | 18 |  |  | 11 |  |  | — |
2029 | 183 |  |  | 15 |  |  | 11 |  |  | — |
Thereafter | 449 |  |  | 215 |  |  | 6 |  |  | 7 |
Total Lease Payments(a) | 1,556 |  |  | 322 |  |  | 61 |  |  | 7 |
Less: Imputed interest | (301) |  |  | (154) |  |  | (9) |  |  | (4) |
Total | $ | 1,255 |  |  | $ | 168 |  |  | $ | 52 |  |  | $ | 3 |
(a) Future minimum lease payments in the table reflect incentive credits related to leased B737-9 aircraft. As a result, the operating lease liabilities presented on the consolidated balance sheet will not agree to this table.

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- Definition Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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