Atlanta's Hartsfield-Jackson held onto its crown as the world's busiest airport, while Beijing stayed in second place for the sixth straight year and Dubai leapfrogged Heathrow to claim third.
The rankings revealed yesterday by Airports Council International are based on preliminary figures from nearly 1,150 airports, including both domestic and international arrivals and departures.
For the second year in a row, Hartsfield-Jackson airport broke the 100 million passenger mark, with more than 101 million travellers passing through its terminals - up 5.5 per cent on 2014.
Beijing Capital International Airport was just shy of 90 million passengers, while third-place Dubai International saw a massive 10.7 per cent rise to 78 million.
Like Dubai, Chicago O'Hare jumped three spots in last year's table, going from seventh to fourth with 76.9 million passengers, a 9.8 per cent increase.