American Airlines

Merger completed

Merger announced

TWA

America West

US Airways

US Airways

Delta Air Lines

Northwest Airlines

United Airlines

Continental Airlines

Southwest Airlines

AirTran Airways

’01

’02

’03

’04

’05

’06

’07

’08

’09

’10

’11

’12

’13

SOURCE: Airlines for America. GRAPHIC: Tobey - The Washington Post. Published Nov. 12, 2013.