US air traffic control failure causes massive flight cancellations and delays

A technical failure in United States air traffic control systems caused widespread flight cancellations and delays following a national takeoff ban on November 13, 2026. The Federal Aviation Administration issued the ban, which lasted for more than four hours and was lifted around 20:15 local time on November 13, 2026. This incident represents the first national flight restriction in the United States since January 2023.

System failure and flight disruptions

The disruption caused significant impact across the aviation network. FlightAware reported 12,506 total canceled flights following the system failure. On Friday, November 13, 2026, there were 9,132 canceled flights and 7,030 delayed flights. The impact continued into the following day, with 3,374 flights canceled and 1,008 delayed on Saturday, November 14, 2026.

The scale of the disruption was immense, as 11,000 flights were planned to depart from United States airports after 16:00 on Friday, November 13, 2026. Additionally, 1.5 million passengers planned to fly from United States airports after 16:00 on Friday. During the takeoff ban, more than 3,000 aircraft were in the air and landed safely, though Hedefhalk.com reported that 3,500 aircraft were in the air during the disruption.

The disruption affected various sectors, including professional and university sports teams, which were forced to seek alternative transportation due to the cancellations.

Technical cause and investigation

The failure was triggered by a technical issue where new technology overloaded outdated equipment. This overload caused disruptions to communication and radar coverage. The Federal Aviation Administration is currently investigating the cause of the failure, and officials stated there is no evidence of a cyberattack.

United States Secretary of Transportation Sean Duffy stated that the worst is behind the country and the system is operating safely. Sean Duffy noted that the issue was caused by old switches and routers being overloaded by new technology. FAA Administrator Bryan Bedford stated that the worst is behind the country and flight schedules should return to normal by the end of the weekend. The FAA Administrator stated that flight schedules are expected to return to normal by the end of Sunday, November 15, 2026.

Funding and modernization efforts

The incident highlights ongoing challenges regarding infrastructure. The United States administration has requested an additional $30.1 billion in funding, which includes $10.1 billion specifically for air traffic control. This request follows previous legislative actions where Congress approved $12.5 billion for the modernization of telecommunications and radar systems.

Glossary

• air traffic control systems — These are systems used in aviation. They are provided by Northrop Grumman Electronic Systems.
• radar coverage — This refers to the area monitored by different types of radars to determine the position of aircraft. It can be provided by en-route, airport surveillance, surface movement, or secondary surveillance radars.