CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Revenues
Revenue	$ 11,735	$ 10,426	$ 9,646
Operating Expenses
Wages and benefits	3,588	3,041	2,640
Variable incentive pay	358	200	257
Aircraft fuel, including hedging gains and losses	2,506	2,641	2,668
Aircraft maintenance	620	488	424
Aircraft rent	207	208	291
Landing fees and other rentals	781	680	581
Contracted services	444	389	329
Selling expenses	349	303	295
Depreciation and amortization	583	451	415
Food and beverage service	287	241	197
Third-party regional carrier expense	243	218	182
Other	854	729	717
Special items - operating	345	443	580
Total Operating Expenses	11,165	10,032	9,576
Operating Income	570	394	70
Non-operating Income (Expense)
Interest income	101	80	53
Interest expense	(171)	(121)	(108)
Interest capitalized	29	27	14
Special items - net non-operating	16	(18)	0
Other - net	0	(39)	50
Total Non-operating Income (Expense)	(25)	(71)	9
Income Before Income Tax	545	323	79
Income tax expense	150	88	21
Net Income	$ 395	$ 235	$ 58
Basic earnings per share	$ 3.13	$ 1.84	$ 0.46
Diluted earnings per share	$ 3.08	$ 1.83	$ 0.45
Weighted Average Shares Outstanding used for computation:
Basic	126,136	127,375	126,657
Diluted	128,372	128,708	127,899
Passenger Revenue
Operating Revenues
Revenue	$ 10,654	$ 9,526	$ 8,808
Passenger Revenue | Passenger
Operating Revenues
Revenue	10,654	9,526	8,808
Mileage Plan Revenue
Operating Revenues
Revenue	1,913	1,682	1,521
Mileage Plan Revenue | Passenger
Operating Revenues
Revenue	1,180	1,034	931
Mileage Plan Revenue | Mileage Plan Services, Other
Operating Revenues
Revenue	733	648	590
Cargo and other revenue
Operating Revenues
Revenue	348	252	248
Cargo and other revenue | Cargo and Freight
Operating Revenues
Revenue	$ 348	$ 252	$ 248