"Table 10. Top 10 U.S. Airlines, ranked by October 2006 Domestic Scheduled Enplanements",,,, "Passenger numbers in millions (000,000)",,,, October 2006 Rank,Carrier,October 2006 Enplanements,October 2005 Rank,October 2005 Enplanements 1,Southwest,8.1,1,7.6 2,American ,6.3,2,6.2 3,Delta ,5.2,3,5.8 4,United ,4.8,4,4.6 5,Northwest ,3.8,5,3.6 6,Continental ,3.0,7,2.8 7,US Airways ,2.7,6,2.8 8,SkyWest ,1.6,10,1.4 9,America West ,1.6,8,1.7 10,AirTran ,1.6,11,1.4 "Source: Bureau of Transportation Statistics, T-100 Domestic Market",,,, Note: Percentage changes based on numbers prior to rounding,,,, ,,,,