CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net Income	$ 100	$ 395	$ 235
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	795	583	451
Stock-based compensation and other	10	63	85
Non-cash special items	51	(70)	422
Changes in certain assets and liabilities:
Changes in deferred income taxes	47	135	81
Increase in accounts receivable	(4)	(128)	(19)
Increase (decrease) in air traffic liability	(23)	63	(44)
Increase in deferred revenue	177	116	106
Other - net	96	307	(267)
Net cash provided by operating activities	1,249	1,464	1,050
Property and equipment additions
Aircraft and aircraft purchase deposits	(1,063)	(817)	(1,055)
Other flight equipment	(216)	(171)	(197)
Other property and equipment	(309)	(293)	(242)
Acquisition of Hawaiian, net of cash acquired	0	(659)	0
Supplier proceeds	0	162	0
Purchases of marketable securities	(1,479)	(832)	(536)
Sales and maturities of marketable securities	1,289	1,761	1,152
Other investing activities	155	215	(86)
Net cash used in investing activities	(1,623)	(634)	(964)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt, net of issuance costs	808	2,310	411
Long-term debt payments	(519)	(1,915)	(282)
Common stock repurchases	(570)	(312)	(137)
Other financing activities	82	36	(139)
Net cash provided by (used in) financing activities	(199)	119	(147)
Net increase (decrease) in cash and cash equivalents	(573)	949	(61)
Cash, cash equivalents, and restricted cash at beginning of period	1,257	308	369
Cash, cash equivalents, and restricted cash at end of period	684	1,257	308
Cash paid during the year for:
Interest, net of amount capitalized	223	148	105
Income taxes, net of refunds received	3	22	15
Non-cash transactions:
Right-of-use assets acquired through operating leases	173	35	178
Operating leases converted to finance leases	200	0	505
Property and equipment acquired through the issuance of debt	69	68	179
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	627	1,201	281
Restricted cash	28	29	0
Restricted cash included in Other noncurrent assets	29	27	27
Total cash, cash equivalents, and restricted cash at end of period	$ 684	$ 1,257	$ 308