"Table 3. Top 10 U.S. Airlines, ranked by January-May 2009 System* Scheduled Enplanements",,,,, "Passenger numbers in millions (000,000)",,,,, Jan-May 2009 Rank,Carrier,Jan-May 2009 Enplaned Passengers,Jan-May 2008 Rank,Jan-May 2008 Enplaned Passengers,Pct. Change 2008-2009 1,Southwest,40.550,1,42.808,-5.3 2,American,34.799,2,38.919,-10.6 3,Delta,26.970,3,28.875,-6.6 4,United,22.557,4,26.318,-14.3 5,US Airways,21.332,5,23.069,-7.5 6,Continental,17.665,7,19.971,-11.5 7,Northwest,16.762,6,21.012,-20.2 8,AirTran,9.326,8,9.899,-5.8 9,JetBlue,9.038,9,9.223,-2.0 10,SkyWest,8.159,10,8.625,-5.4 "Source: Bureau of Transportation Statistics, T-100 Market",,,,, * System equals domestic plus international,,,,, Note: Percent changes based on numbers prior to rounding.,,,,,