Residual Flight Delays Expected Sunday From Critical FAA Warning System Outage

More than 500 flight delays were reported Sunday morning following the outage.

A plane takes off from Reagan National Airport after the crash last night of an American Airlines plane on the Potomac River as it approached the airport in Arlington, Va., on Jan. 30, 2025. Al Drago/Getty Images

Flights throughout the United States could experience “residual delays” Sunday morning while the Federal Aviation Administration (FAA) works to restore a critical warning system that faced an outage the night before, Secretary of Transportation Sean Duffy said on Feb. 1.

“The primary NOTAM system is experiencing a temporary outage, but there is currently no impact to the National Airspace System because a backup system is in place,” Duffy wrote in a post on social media platform X, adding that the FAA has activated a contingency system to “supplement and support preflight briefings and continue flight operations.”