The Federal Aviation Administration imposed a ground stop at O’Hare International Airport on September 17, 2026, halting flight operations for nearly two hours.
As a result of the FAA service halt, O’Hare recorded the highest number of flight cancellations worldwide for the day, with numerous flights cancelled or delayed.
Travelers at O’Hare experienced significant delays and cancellations impacting both domestic and international travel schedules during the disruption.
