Flights across the United States were grounded on Friday after a major communications failure affected the Federal Aviation Administration’s air traffic control network. The FAA ordered a nationwide ground stop for safety reasons, preventing aircraft from departing airports for more than four hours before lifting the restrictions Friday evening.
The shutdown affected 22 regional air traffic control centers responsible for directing aircraft between airports. Although flights have been cleared to resume, thousands of passengers continue to face cancellations, delays and disrupted travel plans as airlines work to restore normal schedules.
What Caused the FAA Ground Stop?
The FAA issued the emergency order on November 13 after a telecommunications outage disrupted communications across its air traffic control network.
The agency described the decision as necessary “due to extraordinary circumstances and for reasons of safety.”
Transportation Secretary Sean Duffy confirmed that the problem affected all 22 Air Route Traffic Control Centers. These facilities coordinate aircraft movements across large sections of American airspace.
The communications failure made it difficult for controllers to maintain normal coordination between facilities. The FAA therefore stopped departures as a precaution while technicians investigated the problem.
Aircraft already flying were generally permitted to continue toward their destinations, while international arrivals were managed individually.
Was the Flight Shutdown Caused by a Cyberattack?
Federal officials said investigators had found no evidence that the outage resulted from a cyberattack or deliberate interference.
Homeland Security Secretary Markwayne Mullin addressed the incident during a White House briefing.
“There was no indication, as of yet, that this was a nefarious attack against us, it’s just a telecommunication outage, as of right now,” Mullin said.
Officials instead pointed to problems involving aging telecommunications equipment used by the country’s air traffic control system.
The disruption raised additional concerns about infrastructure that still relies on older copper wiring, switches and other communications technology.
How Many Flights Were Canceled or Delayed?
The nationwide ground stop disrupted thousands of domestic and international flights, affecting major airports in New York, Chicago, Atlanta, Los Angeles, Boston and Dallas.
Reports indicated that nearly 5,000 flights had been canceled during the disruption. At least 600 aircraft were diverted, while thousands of additional flights experienced delays.
Passengers remained inside airport terminals and aircraft as airlines waited for clearance to resume departures.
United Airlines and JetBlue canceled large portions of their remaining Friday evening schedules. Delta Air Lines also reported operational disruptions as aircraft and flight crews were left in different locations from their planned assignments.
International travel was affected after European aviation authorities temporarily suspended US-bound departures at the FAA’s request.
When Will Flights Return to Normal?
The FAA lifted the nationwide ground stop Friday evening after technicians tested the affected communications systems and confirmed they were stable.
Transportation Secretary Sean Duffy said, “We have opened up the airspace.”
However, the government warned that flight schedules would not immediately return to normal. Airlines needed additional time to reposition aircraft, arrange replacement crews and accommodate passengers whose flights had been canceled.
The shutdown was the first nationwide FAA ground stop since January 2023, when a failure involving the agency’s flight safety notification system temporarily halted domestic departures.
The FAA has allowed flights to resume across the United States, but airlines are continuing recovery operations on Saturday, November 14. Travelers with scheduled departures are being advised to check their flight status directly with their airline before heading to the airport.
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