Net Cash Provided by (Used in) Operating Activity
Millions
		2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018***	2019	2020
AMR Corp		3,142	542	(1,111)	601	717	1,024	1,939	1,935	(1,394)	643	1,050	697	(1,876)	(1,834)	3,080	6,249	6,524	4,744	3,533	3,815	(6,543)
Continental Airlines Inc**		906	567	(46)	342	373	457	1,058	1,133	(324)	(362)	-	-	-	-	-	-	-	-	-	-	-
Delta Air Lines Inc		2,898	236	225	244	(1,023)	(307)	993	1,359	(1,707)	1,379	2,832	2,834	2,476	4,504	4,947	7,927	7,205	5,148	7,014	8,425	(3,793)
Northwest Airlines Corp		893	646	(284)	375	276	(437)	1,224	1,371	(418)	-	-	-	-	-	-	-	-	-	-	-	-
UAL Corp**		2,472	(160)	(1,139)	1,001	99	1,079	1,562	2,134	(1,239)	966	1,907	2,408	935	1,444	2,634	5,992	5,542	3,413	6,146	6,879	(4,145)
US Airways Group Inc I		697	(112)	(364)	(167)	(89)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
US Airways Group Inc II		-	-	-	-	-	-	618	442	(980)	59	804	472	1,017	1,156	-	-	-	-	-	-	-
America West Holdings Corp		190	152	(23)	242	21	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Midwest Air Group Inc		43	25	27	27	(14)	17	21	-	-	-	-	-	-	-	-	-	-	-	-	-	-
--sub Network and Regional		11,241	1,897	(2,714)	2,665	360	1,833	7,415	8,374	(6,062)	2,685	6,593	6,411	2,552	5,270	10,661	20,168	19,271	13,305	16,693	19,119	(14,481)
Southwest Airlines Co		1,298	1,485	520	1,336	1,066	2,118	1,406	2,845	(1,521)	985	1,561	1,385	2,064	2,477	2,902	3,238	4,293	3,929	4,893	3,987	(1,127)
AirTran Holdings Inc		69	95	6	133	38	65	75	182	(180)	118	161	-	-	-	-	-	-	-	-	-	-
JetBlue Airways Corp		3	111	217	287	199	170	274	358	(17)	486	523	614	698	758	912	1,598	1,632	1,398	1,217	1,449	(683)
Alaska Air Group Inc		273	287	125	355	333	270	450	482	164	293	554	696	753	981	1,030	1,584	1,386	1,590	1,195	1,722	(234)
Hawaiian Holdings Inc		63	57	10	(38)	(8)	58	63	82	134	136	150	179	311	243	300	476	437	331	509	485	(311)
--sub Hybrid		1,707	2,035	878	2,073	1,629	2,681	2,268	3,949	(1,419)	2,018	2,949	2,874	3,826	4,459	5,144	6,896	7,748	7,248	7,814	7,643	(2,355)
Frontier Airlines Holdings Inc*		73	40	1	128	19	80	23	31	(123)	-	-	-	-	-	-	-	-	-	-	-	-
Spirit Airlines, Inc.		-	-	-	-	-	-	-	-	-	-	27	171	114	195	261	473	474	425	506	551	(225)
-- sub ULCC		73	40	1	128	19	80	23	31	(123)	-	27	171	114	195	261	473	474	425	506	551	(225)
Total All Sectors		13,020	3,972	(1,835)	4,867	2,008	4,593	9,706	12,353	(7,604)	4,703	9,569	9,456	6,492	9,925	16,066	27,537	27,493	20,978	25,013	27,313	(17,061)
* Frontier Airlines Inc before 2006. Year end March 31 treated as the year before.
** United and Continental are assumed as a single carrier beginning October 1, 2010
*** Note: In 2018, many airlines changed their accounting principles to conform to new standards, which lead to some significant changes in the numbers reported compared to previous years. For the sake of clarity, many airlines provided recast 2017 results in their 10-K reports that
can be found in SEC’s EDGAR tool.
Note: Zero value might also mean data not reported.
Data Source:  SEC 10K Filings