The Federal Aviation Administration imposed a ground stop at O’Hare International Airport on September 17, 2026, which lasted nearly two hours. This suspension of operations halted departing flights from the airport during the period.
As a result of the FAA service halt, O’Hare recorded the highest number of flight cancellations worldwide on that day. The stoppage caused widespread operational disruptions, grounding hundreds of flights and generating significant delays for travelers both at the airport and on connecting routes globally.
