CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating Revenues
Passenger, Mainline	$ 896	$ 863	$ 1,692	$ 1,586
Passenger, Regional	192	188	374	361
Total passenger revenue	1,088	1,051	2,066	1,947
Freight and mail	30	31	56	55
Other - net	138	132	268	251
Total Operating Revenues	1,256	1,214	2,390	2,253
Operating Expenses
Wages and benefits	258	259	522	515
Variable incentive pay	21	22	42	38
Aircraft fuel, including hedging gains and losses	372	433	753	751
Aircraft maintenance	67	54	133	105
Aircraft rent	30	29	59	57
Landing fees and other rentals	75	60	136	123
Contracted services	54	50	107	98
Selling expenses	51	44	89	85
Depreciation and amortization	68	66	136	129
Food and beverage service	21	20	41	37
Other	65	61	133	126
Total Operating Expenses	1,082	1,098	2,151	2,064
Operating Income	174	116	239	189
Nonoperating income (expense)
Interest income	4	5	9	10
Interest expense	(14)	(17)	(29)	(34)
Interest capitalized	5	3	9	8
Other - net	0	2	1	3
Nonoperating Income (Expense) Total	(5)	(7)	(10)	(13)
Income before income tax	169	109	229	176
Income tax expense	65	41	88	67
Net Income	$ 104	$ 68	$ 141	$ 109
Basic Earnings Per Share	$ 1.49	$ 0.95	$ 2.00	$ 1.53
Diluted Earnings Per Share	$ 1.47	$ 0.93	$ 1.98	$ 1.50
Shares used for computation:
Basic shares	70,252	70,996	70,342	71,069
Diluted shares	71,159	72,200	71,297	72,325