Telecommunications maintenance error causes nationwide United States flight suspension

A nationwide flight suspension lasted four hours across the United States on Friday, November 14, 2026, due to telecommunications issues. The disruption occurred while contractors performed routine maintenance to replace old copper cabling with fiber optic cables. The Federal Aviation Administration temporarily lifted the suspension at approximately 21:00 on Friday, November 14, 2026.

Infrastructure maintenance failure

The disruption was caused by a router failure during infrastructure modernization efforts. L3Harris, a contractor for the Federal Aviation Administration, was performing maintenance when the failure triggered a chain reaction affecting aircraft communication and radar. L3Harris is currently collaborating with the Federal Aviation Administration on the investigation into the infrastructure modernization.

U.S. Secretary of Transportation Sean Duffy stated the incident was not a cyberattack. Secretary Sean Duffy said the incident was a failure of an obsolete system or a contractor error. While some reports indicated that 12,000 flights were canceled on Friday, other reports regarding the total number of cancellations on Friday remain unspecified.

Widespread flight disruptions

The impact of the technical failure extended into Saturday, November 15, 2026. As of 17:30 local time on Saturday, FlightAware reported over 5,500 canceled flights and 6,900 delays across the United States. These figures occur alongside a total of 41,000 scheduled flights for Saturday. Federal Aviation Administration Administrator Bryan Bedford previously predicted that 5,000 flights would be canceled on Saturday.

Montréal-Trudeau International Airport experienced approximately 100 cancellations within a 24-hour period. This total included 61 cancellations on Friday and approximately 40 cancellations on Saturday. Anne-Sophie Hamel, a spokesperson for Aéroports de Montréal, said aircraft that could not land on Friday were unable to depart on Saturday.

Systemic and financial considerations

Federal Aviation Administration Administrator Bryan Bedford ruled out a connection between the failure and a recently implemented artificial intelligence system used for weather and flight trajectory management. This specific flight suspension measure has been applied three times during this century.

The incident has prompted discussions regarding funding for national airspace infrastructure. Reports regarding the specific amount requested by Secretary Sean Duffy from Congress vary. One report stated that Secretary Sean Duffy requested 30.1 billion dollars from Congress, while another report stated the request was 50 billion dollars. The Federal Aviation Administration continues to work with L3Harris to modernize the National Airspace System infrastructure.

Glossary

• Federal Aviation Administration — The Federal Aviation Administration is a government agency that issues charting notices and manages databases and aeronautical charts. It also oversees the modernization of the National Airspace System infrastructure.
• National Airspace System — The National Airspace System is the infrastructure used for aircraft operations. It is subject to modernization efforts to maintain its functionality.
• Aéroports de Montréal — Aéroports de Montréal provides security at Montréal–Pierre Elliott Trudeau International Airport.