"Table 4. Top 10 U.S. Airlines, ranked by April 2007 System* Scheduled Enplanements",,,,, "Passenger numbers in millions (000,000) ",,,,, Apr 2007 Rank,Carrier,Apr 2007 Enplaned Passengers,Apr 2006 Rank,Apr 2006 Enplaned Passengers,Pct. Change 2006-2007 1,Southwest,8.435,2,8.131,3.7 2,American,8.202,1,8.425,-2.7 3,Delta,6.154,3,6.156,0.0 4,United,5.903,4,5.841,1.0 5,Northwest,4.589,5,4.606,-0.4 6,Continental,4.217,6,4.037,4.5 7,US Airways,3.290,7,3.264,0.8 8,AirTran,1.997,9,1.768,12.9 9,JetBlue,1.933,10,1.599,20.9 10,SkyWest,1.793,12,1.571,14.1 "Source: Bureau of Transportation Statistics, T-100 Market",,,,, * System equals domestic plus international,,,,, Note: Percent changes based on numbers prior to rounding.,,,,,