CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Cash flows from operating activities:
Net Income	$ 588	$ 414
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	317	290
Stock-based compensation and other	20	34
Changes in certain assets and liabilities:
Changes in deferred tax provision	187	122
Increase in air traffic liability	244	144
Increase in deferred revenue	97	106
Pension contribution	(65)	0
Other—net	(7)	(124)
Net cash provided by operating activities	1,381	986
Property and equipment additions:
Aircraft and aircraft purchase deposits	(286)	(349)
Other flight equipment	(125)	(76)
Other property and equipment	(116)	(129)
Total property and equipment additions, including capitalized interest	(527)	(554)
Purchases of marketable securities	(1,446)	(672)
Sales and maturities of marketable securities	1,228	857
Other investing activities	37	36
Net cash used in investing activities	(708)	(333)
Cash flows from financing activities:
Proceeds from issuance of debt	356	0
Long-term debt payments	(752)	(544)
Common stock repurchases	(53)	(37)
Dividends paid	(129)	(118)
Other financing activities	40	33
Net cash used in financing activities	(538)	(666)
Net increase (decrease) in cash, cash equivalents, and restricted cash	135	(13)
Cash, cash equivalents, and restricted cash at beginning of year	114	197
Cash, cash equivalents, and restricted cash at end of the period	249
Cash paid during the period for:
Interest (net of amount capitalized)	48	60
Income taxes, net of refunds received	2	$ 0
Cash and cash equivalents	237
Restricted cash included in Prepaid expenses and other current assets	$ 12