"Table 9. Top 10 U.S. Airlines, ranked by Jan.-April 2006 Domestic Enplanements",,,,, "Passenger numbers in millions (000,000)",,,,, Jan.-Apr. 2006 Rank,Carrier,Jan.-Apr. 2006 Enplanements,Jan.-Apr. 2005 Rank,Jan.-Apr. 2005 Enplanements, ,,,,, 1,Southwest Airlines,30.2,1,26.9, 2,American Airlines,25.2,3,24.5, 3,Delta Air Lines,21.4,2,26.5, 4,United Airlines,18.2,4,17.3, 5,Northwest Airlines,14.0,5,15.2, 6,Continental Airlines,11.6,7,10.5, 7,US Airways,10.6,6,12.9, 8,America West Airlines,6.4,8,6.6, 9,AirTran Airways,6.2,11,4.8, 10,JetBlue Airways,5.8,12,4.6, "Source: Bureau of Transportation Statistics, T-100 Domestic Market",,,,, Note: Percentage changes based on numbers prior to rounding,,,,,