Chicago’s O’Hare International Airport had 903,747 arriving and departing flights last year, the most of any airport in the US, according to the US Department of Transportation.

O’Hare regained the crown as the nation’s busiest airport in 2018, topping Atlanta’s Hartsfield-Jackson International Airport, which handled 895,592 flights last year. The Atlanta airport had been the nation’s busiest air hub every year since 2014.

Chicago’s Midway Airport handled an additional 243,322 flights. Arrivals and departures at O’Hare increased 4.2 per cent between 2017 and 2018.

Other busy US airports included Los Angeles International Airport (707,833 flights), Dallas-Fort Worth International Airport (667,213 flights), and Denver International Airport (603,322 flights).

Atlanta’s ranking slipped despite traffic growing 1.8 per cent last year. Traffic was also up at the other leading airports — 1.1 per cent at LAX, 2 per cent a Dallas-Fort Worth, and 3.6 per cent at Denver.

Overall, more than 2.6 million people fly each day in the US, with airports handling in excess of 10 million flights annually, according to the Federal Aviation Administration.