Until 2005, O'Hare was the world's busiest airport in number of takeoffs and landings, however, has changed to World's largest again in September 2014, with 580,000 passengers as of September 25th.
O'Hare was the world's busiest airport in number of takeoffs. This was until 2005. Landings has changed to World's largest again in September 2014. This was with 580,000 passengers as of September 25th. This was until 2005. This was however.