CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Revenues
Passenger, Mainline	$ 796	$ 723
Passenger, Regional	182	173
Total passenger revenue	978	896
Freight and mail	26	24
Other - net	129	119
Total Operating Revenues	1,133	1,039
Operating Expenses
Wages and benefits	264	257
Variable incentive pay	21	16
Aircraft fuel, including hedging gains and losses	381	319
Aircraft maintenance	66	50
Aircraft rent	30	28
Landing fees and other rentals	60	62
Contracted services	53	48
Selling expenses	38	41
Depreciation and amortization	69	64
Food and beverage service	20	18
Other	67	64
Total Operating Expenses	1,069	967
Operating Income	64	72
Nonoperating income (expense)
Interest income	4	5
Interest expense	(16)	(17)
Interest capitalized	5	5
Other - net	2	1
Nonoperating Income (Expense) Total	(5)	(6)
Income before income tax	59	66
Income tax expense	22	25
Net Income	$ 37	$ 41
Basic Earnings Per Share	$ 0.52	$ 0.57
Diluted Earnings Per Share	$ 0.51	$ 0.56
Shares used for computation:
Basic shares	70,431	71,192
Diluted shares	71,414	72,659