World's largest airlines(By passenger-kilometres flown (millions))

Rank	Airline	2013	2012	2011	2010	2009
1	American Airlines	346,878	330,323	219,492	216,132	209,321
2	United Airlines	330,184	330,696	334,989	338,833	327,479
3	Delta Air Lines	313,803	310,562	310,228	310,875	304,074
4	Emirates	215,353	188,606	160,549	146,205	126,331
5	Southwest Airlines	167,932	165,561	157,044	125,604	119,826
6	Lufthansa	153,334	149,780	141,055	129,668	122,991
7	China Southern Airlines	148,417	135,535	122,344	111,328	93,002
8	Air China	141,967	129,773	123,489	105,695	75,474
9	Air France	139,824	137,606	135,129	127,763	128,326
10	British Airways	131,333	126,436	117,348	106,082	114,346