"Table 4. Top 10 U.S. Airlines, ranked by September 2006 System* Scheduled Enplanements",,,,,
"Passenger numbers in millions (000,000) ",,,,,
September 2006 Rank,Carrier,September 2006 Enplaned Passengers,September 2005 Rank,September 2005 Enplaned Passengers,
1,Southwest  ,7.5,2,7.0,
2,American ,7.3,1,7.5,
3,Delta,5.4,3,6.3,
4,United ,5.4,4,5.3,
5,Northwest ,4.3,5,4.4,
6,Continental  ,3.4,6,3.1,
7,US Airways ,2.6,7,3.0,
8,SkyWest  ,1.6,10,1.4,
9,America West  ,1.6,8,1.7,
10,American Eagle ,1.5,9,1.5,
"Source: Bureau of Transportation Statistics, T-100 Market",,,,,
* System equals domestic plus international,,,,,
Note: Percentage changes based on numbers prior to rounding.,,,,,