Major: American & United Airlines Cut 2,700 May Flights From The World’s Busiest Airport

While Hartsfield-Jackson Atlanta International Airport (ATL) has long been the world’s busiest airport by passenger numbers, Chicago O’Hare International Airport (ORD) takes the top spot when ranked by aircraft movements. A key reason behind this paradox is the increased use of regional jets at O’Hare, with feeder services allowing passengers from the Midwest and beyond to connect onto mainline flights operated by major US legacy carriers.