"Table 4. Top 10 U.S. Airlines, ranked by May 2008 System* Scheduled Enplanements",,,,, "Passenger numbers in millions (000,000)",,,,, May 2008 Rank,Carrier,May 2008 Enplaned Passengers,May 2007 Rank,May 2007 Enplaned Passengers,Pct. Change 2007-2008 1,Southwest,9.305,1,8.930,4.2 2,American,8.323,2,8.454,-1.6 3,Delta,5.937,3,6.075,-2.3 4,United,5.657,4,6.062,-6.7 5,US Airways**,4.787,7,3.308,44.7 6,Northwest,4.463,5,4.759,-6.2 7,Continental,4.177,6,4.270,-2.2 8,AirTran,2.201,8,2.079,5.9 9,SkyWest,1.805,9,1.916,-5.8 10,JetBlue,1.795,11,1.813,-1.0 "Source: Bureau of Transportation Statistics, T-100 Market",,,,, * System equals domestic plus international,,,,, ** US Airways May 2008 number is the report of the merged US Airways and America West. The May 2007 numbers were reported separately by US Airways and America West. America West reported 1.832 million system passengers in May 2007.,,,,, Note: Percent changes based on numbers prior to rounding.,,,,, ,,,,, ,,,,,