Chicago's O'Hare International Airport is the nation's busiest airport.
O'Hare had more than 477-thousand flights during the first half of 2006.
Hartsfield-Jackson Atlanta International Airport was second, with more than 472-thousand take-offs and landings.
The Federal Aviation Administration says Dallas/Fort Worth International Airport was the third busiest.
Atlanta argues that it is consistently the nation's busiest airport in terms of passengers.
While busy, O'Hare saw a one-point-three percent decrease in flights. Chicago officials attribute that to an FAA-imposed limit on the number of flights at O'Hare to help relieve congestion there.
Atlanta had five percent fewer flights compared to the same time last year. A spokeswoman notes that the airport has been affected by airlines cutting down on flights that are not full or near full because of high fuel prices.
Viewers with disabilities can get assistance accessing this station's FCC Public Inspection File by contacting the station with the information listed below. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, 888-835-5322 (TTY), or email@example.com.