Delta Air Lines Inc
All units in Millions or Millions USD	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018*	2019	2020
Income Statement
Passenger Revenue	15,657	12,964	12,798	13,022	13,790	14,592	15,493	16,928	19,583	23,807	27,258	30,257	31,807	32,942	34,954	34,782	33,777	34,819	39,755	42,277	12,883
Regional Affiliate Revenue			2,049	2,629	2,910	3,225	3,853	4,170	4,446	5,285	5,850	6,393	6,570	6,408	6,266	5,884	5,672	5,714	0	0	0
Total Revenue	16,741	13,879	13,866	14,308	15,235	16,480	17,532	19,154	22,697	28,063	31,755	35,115	36,670	37,773	40,362	40,704	39,639	41,244	44,438	47,007	17,095
Wages Salaries & Benefits	5,971	6,124	6,165	6,342	6,338	5,290	4,365	4,189	4,802	6,838	6,751	6,894	7,266	7,720	8,120	8,776	10,034	10,436	10,743	11,225	8,754
Aircraft Fuel Expense	1,969	1,817	1,683	1,938	2,924	4,466	4,433	4,686	7,346	7,384	7,594	9,730	10,150	9,397	11,668	6,544	5,133	5,733	9,020	8,519	3,176
Depreciation & Amortization	1,187	1,283	1,181	1,230	1,244	1,273	1,276	1,164	1,266	1,536	1,511	1,523	1,565	1,658	1,771	1,835	1,902	2,235	2,329	2,581	2,312
Net Interest Expense	257	410	629	721	787	973	801	524	593	881	969	901	828	698	650	481	388	396	311	(301)	(929)
Operating Expense	15,104	15,481	15,175	15,093	18,543	18,481	17,474	18,058	31,011	28,387	29,538	33,140	34,495	34,373	38,156	32,902	32,687	35,130	39,174	40,389	29,564
Operating Income (Loss)	1,637	(1,602)	(1,309)	(785)	(3,308)	(2,001)	58	1,096	(8,314)	(324)	2,217	1,975	2,175	3,400	2,206	7,802	6,952	6,114	5,264	6,618	(12,469)
Pretax Income (Loss)	1,549	(1,864)	(2,002)	(1,189)	(3,992)	(3,859)	(6,968)	1,819	(9,041)	(1,581)	608	769	1,025	2,527	1,072	7,157	6,636	5,701	5,151	6,198	(15,587)
Net Income (Loss)	828	(1,216)	(1,272)	(773)	(5,198)	(3,818)	(6,203)	1,612	(8,922)	1,237	593	854	1,009	10,540	659	4,526	4,373	3,577	3,935	4,767	(12,385)
Balance Sheet Asset
Cash & Short-term Investment	1,607	2,215	1,969	2,710	1,799	2,008	2,648	2,786	4,467	4,678	3,610	3,615	3,374	3,803	3,305	3,437	3,249	2,639	1,768	2,882	14,096
Restricted Cash & Short-term Investments	0	0	134	207	348	870	750	520	429	423	440	305	375	122	0	0	0	0	1,136	636	1,156
Total Current Assets	3,205	3,567	3,902	4,550	3,606	4,480	5,385	5,240	8,904	7,991	7,307	7,729	8,272	9,651	9,158	9,056	7,451	7,844	6,340	8,249	17,404
Total Assets	21,931	23,605	24,720	25,939	21,801	20,039	19,622	32,423	45,014	43,789	43,188	43,499	44,550	52,252	54,005	53,134	51,261	53,292	60,266	64,532	71,996
Balance Sheet Liabilities
Air Traffic Liability	1,442	1,224	1,270	1,308	1,567	1,712	1,797	1,982	3,315	3,074	3,306	3,480	3,696	4,122	4,296	4,503	4,626	4,888	4,661	5,116	4,044
Current Liability	5,245	6,403	6,455	6,157	5,941	5,265	5,769	6,605	11,022	9,797	11,385	12,701	13,270	14,152	16,879	17,526	15,239	18,573	18,578	20,204	15,927
Long-term Debt & Capital Lease Obligations, Less Current Maturities	5,896	8,347	10,174	11,538	13,005	6,557	6,509	7,986	15,411	15,665	13,179	11,847	11,082	9,795	8,561	6,766	6,201	6,592	8,253	8,873	27,425
Pension & Post Retirement Benefits	2,026	2,651	5,524	7,139	6,870	0	0	3,867	10,895	11,745	11,493	14,200	16,005	12,392	15,138	13,855	13,378	9,810	9,163	8,452	10,630
Retained Earnings (Accumulated deficit)	4,176	2,930	1,639	844	(4,374)	(8,209)	(14,414)	314	(8,608)	(9,845)	(9,252)	(8,398)	(8,577)	(5,130)	(7,311)	(7,275)	(7,636)	(7,621)	(7,825)	(7,989)	(9,038)
Total Stockholder Equity (deficit)	5,343	3,769	893	(659)	(5,796)	(9,895)	(13,593)	10,113	874	245	897	(1,396)	(2,131)	11,643	8,813	10,850	12,287	13,910	13,687	15,358	1,534
Cash Flow Statement
Net Cash Provided by (Used in) Operating Activity	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)
Net Cash Provided by (Used in) Investing Activities	(3,396)	(2,696)	(1,109)	(362)	(320)	22	(361)	(625)	1,598	(1,008)	(2,026)	(1,498)	(1,962)	(2,756)	(2,463)	(3,955)	(2,155)	(5,366)	(4,393)	(4,563)	(9,238)
Net Cash Provided by (Used in) Financing activities	239	3,306	583	548	636	830	(606)	(120)	1,716	(19)	(2,521)	(1,571)	(755)	(1,320)	(3,240)	(4,088)	(4,260)	(730)	(1,726)	(2,880)	19,356
Payments on Long-term Debt and Capital Lease Obligation	(853)	(173)	(1,113)	(802)	(1,452)	(1,615)	(476)	(1,480)	(1,296)	(2,891)	(3,722)	(4,172)	(2,862)	(1,461)	(2,928)	(2,558)	(1,709)	(1,258)	(3,052)	(3,320)	(8,559)
Proceeds from Issuance of Long-term Debt	1,867	2,335	2,554	1,774	2,123	295	0	2,005	2,132	2,966	1,130	2,395	1,965	268	1,020	1,038	450	2,454	3,745	2,057	22,790
Net Increase (Decrease) in Cash	(259)	846	(301)	430	(707)	545	36	614	1,607	352	(1,715)	(235)	(241)	428	(756)	(116)	790	(948)	895	982	6,325
Operating Statistics
Consolidated Passengers (thousands)	0	0	107,048	104,452	110,000	118,853	106,649	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Consolidated ASM	0	0	145,232	139,505	151,679	156,793	147,995	151,764	165,639	230,331	232,684	234,656	230,415	232,740	239,676	246,764	251,867	254,325	263,365	275,379	134,339
Consolidated RPM	0	0	104,422	102,301	113,311	119,954	116,133	122,065	134,879	188,943	193,169	192,767	192,974	194,988	202,925	209,625	213,098	217,712	225,243	237,680	73,412
Data Source:  SEC 10K Filings
*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.