FAA Grounds Every Departing Flight Nationwide After Communication Failure at Air Traffic Control Centers

The Federal Aviation Administration halted every departing flight at airports across the United States late Friday afternoon, a rare nationwide ground stop the agency said was ordered "due to extraordinary circumstances and for reasons of safety," NBC News reported ^[1].

Transportation Secretary Sean Duffy said on X that the order followed "a communication issue impacting all Air Route Traffic Control Centers," according to The Hill ^[2]. Duffy said FAA technicians were investigating and that the department would share updates as soon as it had them ^[2].

What we know about the cause

The Washington Examiner reported that two FAA employees described a "rolling frequency outage" hitting the facilities that monitor planes already in the air, and that the outlet reviewed documentation of the problem ^[3]. Those en route centers handle aircraft between airports, which is why a failure there can ripple across the entire national airspace at once ^[3].

CNN, citing preliminary reports from law enforcement officials, said the disruption did not appear to be a cyberattack ^[4]. The Department of Homeland Security said there was no indication so far of anything "nefarious," while cautioning that the information was early and could change, CNN reported ^[4]. The FAA has not said publicly what failed or why.

Planes in the air, passengers on the ground

The order applies to departures. Flights already airborne were allowed to continue to their destinations and land, and inbound international flights were to be handled case by case under the FAA advisory, according to CNN ^[4]. Deutsche Welle reported the agency's notice said departing traffic should stay grounded until further notice ^[5].

The effect on travelers was immediate. Flight-tracking figures from FlightAware cited in CNN's coverage showed thousands of delayed flights within, into or out of the United States, along with hundreds of cancellations, and those numbers were climbing as the evening went on ^[4]. The stop landed at the start of the busy Friday evening travel period and less than two weeks before Thanksgiving, one of the heaviest flying seasons of the year.

Travelers with flights Friday night should check directly with their airline before heading to the airport, and expect long lines and missed connections even after departures resume.

A rare step

A full national ground stop is extraordinary. The Center Square noted that Friday's order is only the second time since the Sept. 11, 2001, attacks that flights across the country have been grounded ^[6]. CNN noted that the last nationwide ground stop came in 2023, after an outage the FAA traced to a contractor ^[4].

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Friday's order will put fresh attention on the condition of the nation's air traffic control equipment and on the long-running push to modernize it. For now, the priority is the one the FAA itself named: safety. Keeping planes on the ground while controllers cannot reliably talk to the aircraft they are guiding is the cautious call, and the right one.

This is a developing story. Liberty Bell Report will update it as the FAA, the Transportation Department and the airlines release more information about the cause and when departures will resume.