US air traffic control failure causes nationwide ground stop for four hours

A nationwide ground stop ordered by the Federal Aviation Administration caused widespread air traffic disruption for over four hours on Friday, November 13, 2026. The disruption resulted from serious malfunctions in air traffic control communication and radar systems caused by data overload. This suspension represents the longest national flight grounding in the United States since the September 11, 2001, terrorist attacks.

Technical system malfunctions

The technical failure significantly reduced the volume of air traffic within United States airspace. The number of aircraft in the airspace decreased from approximately 3,500 to fewer than 400 during the incident. The Federal Aviation Administration lifted the takeoff ban late on the evening of Friday, November 13, 2026.

The incident has highlighted the reliance of the United States air traffic control system on aging technological infrastructure. While the disruption originated from technical failures, the impact extended beyond domestic borders. The disruption affected both domestic and international flights, including those in Canada and Mexico.

Flight cancellation data

The scale of the disruption is reflected in the high number of flight cancellations and delays. Federal Aviation Administration Administrator Brian Bentford stated that the Federal Aviation Administration could not reschedule 12,000 flights on Friday. This figure includes 9,000 commercial flights and 3,000 private flights.

Data regarding total cancellations varies across different reports. FlightAware recorded 12,506 cancellations for the two-day period of November 13 and November 14. Other reports provided different figures, including 3,500 cancellations reported by Naftemporiki on Saturday morning and 11,500 reported by Protothema. The Federal Aviation Administration estimated that between 4,000 and 5,000 cancellations would occur on Saturday, November 14, out of 41,000 total scheduled flights for that day.

Individual airlines reported significant impacts on their schedules. Delta Air Lines recorded 631 cancellations, representing 20% of its daily schedule. JetBlue reported 335 cancellations, which accounts for 40% of its departures. American Airlines recorded 431 cancellations, representing 15% of its schedule.

Recovery and modernization

Airlines are currently working to reposition aircraft and crews to restore normal schedules following the disruption. The technical failure has intensified discussions regarding the need for infrastructure upgrades. A request for 50 billion dollars has been made for technological modernization to prevent similar occurrences.

The disruption on Friday, November 13, 2026, left a significant number of travelers stranded. Naftemporiki reported 1,200 flight delays on Saturday morning. Total scheduled domestic and international flights for the day reached 22,600 according to Cirium.

Glossary

• ground stop — A ground stop is a suspension of flights issued by the FAA. It can be used to manage delays or cancellations due to issues such as equipment outages.
• air traffic control — Air traffic control is a system used to manage the volume of air traffic. It relies on technological infrastructure, including communication and radar systems.
• September 11, 2001, terrorist attacks — These attacks caused worldwide aviation to enter a tailspin. They are a historical event referenced in relation to significant flight groundings in the United States.