"Table 9. Top 10 U.S. Airlines, ranked by Jan.- June 2006 Domestic Scheduled Enplanements",,,,, "Passenger numbers in millions (000,000)",,,,, Jan.-June 2006 Rank,Carrier,Jan.-June 2006 Enplanements,Jan.-June 2005 Rank,Jan.-June 2005 Enplanements, ,,,,, 1,Southwest Airlines ,47.3,1,42.6, 2,American Airlines ,38.9,3,38.3, 3,Delta Air Lines,32.1,2,40.5, 4,United Airlines,28.5,4,27.1, 5,Northwest Airlines ,22.1,5,23.7, 6,Continental Airlines ,17.8,7,16.2, 7,US Airways,16.1,6,19.8, 8,America West Airlines,10,8,10.3, 9,AirTran Airways ,9.8,10,7.8, 10,SkyWest Airlines ,9.1,11,7.6, "Source: Bureau of Transportation Statistics, T-100 Domestic Market",,,,, Note: Percentage changes based on numbers prior to rounding,,,,,