Table 6. Top 10 U.S. Airports ranked by March 2006 System* Enplanements,,,,, "Passenger numbers in millions (000,000)",,,,, Mar. 2006 Rank,Airport,Mar. 2006 Enplaned Passengers,Mar. 2005 Rank,Mar. 2005 Enplaned Passengers, ,,,,, 1,Hartsfield-Jackson Atlanta,3.6,1,3.8, 2,Chicago O'Hare,3.1,2,3.0, 3,Dallas-Ft. Worth,2.5,3,2.4, 4,Denver,2.0,7,1.7, 5,Los Angeles Int'l,2.0,4,2.0, 6,Las Vegas McCarran,1.9,6,1.8, 7,Phoenix Sky Harbor,1.9,5,1.8, 8,Houston Bush Intercontinental ,1.7,9,1.6, 9,Minneapolis-St.Paul,1.6,8,1.7, 10,Detroit Metro Wayne County,1.5,10,1.6, " Source: Bureau of Transportation Statistics, T-100 Market",,,,, * System equals domestic plus international,,,,, Note: Percentage changes based on numbers prior to rounding.,,,,,