The Federal Aviation Administration ordered a ground stop at O’Hare International Airport for nearly two hours on September 17, 2026. This suspension of flights led to significant disruption, with O’Hare experiencing the highest number of flight cancellations worldwide that day.
Passengers at O’Hare faced numerous delays and canceled flights as a direct consequence of the FAA order. Several other U.S. airports also encountered delays and cancellations tied to the FAA’s ground stop, although exact figures outside of O’Hare have not been disclosed.
