Lambert-St. Louis International Airport is the 35th busiest airport in North America in terms of 2012 passenger traffic. The preliminary rankings just released by Airports Council International shows Lambert maintained its ranking from 2011 serving 12.7 million passengers the past year. This was a 1.3 percent increase in total passengers versus 2011. Lambert had more total passenger traffic in 2012 than Houston Hobby, Oakland, Kansas City, Nashville and Austin. Hartsfield-Jackson Atlanta International is the busiest airport in both North America and the world serving more than 95 million passengers in 2012.