FAA Nationwide Ground Stop Grounds All U.S. Departures, Biggest Disruption Since 9/11

The FAA ordered every departing aircraft in the United States to stay on the ground Friday, a nationwide stoppage aviation experts are calling the biggest travel disruption since the 9/11 attacks. Multiple Air Route Traffic Control Centers lost communications, and technicians are still investigating. No timeline for recovery exists.

The stakes for sellers of travel are immediate: every U.S. departure is frozen, inbound international flights will be handled case by case, and the knock-on scheduling damage could stretch through the weekend. Airlines, airports and booking channels now face a wave of rebooking, waivers and refund exposure that no carrier has quantified yet.

What did the FAA actually order?

The agency's advisory was blunt. "All departing traffic should remain ground stopped until further notice. Inbound international flights will be managed on a case by case basis," the FAA said. In a statement, the agency confirmed the trigger: "The FAA issued a nationwide ground stop for all U.S. airports following communication issues impacting multiple Air Route Traffic Control Centers. FAA technicians are investigating the issue."

The agency stressed the information was preliminary and subject to change. That caveat matters. Nothing in the advisory promises a fix, and nothing rules out an extended outage.

Transportation Secretary Sean Duffy confirmed the scope on X: "The @FAAnews issued a nationwide ground stop for all U.S. airports following a communication issue impacting all Air Route Traffic Control Centers. FAA technicians are investigating the issue. We will provide immediate updates as we have them." The Pentagon referred questions back to the FAA.

How bad is it compared with past disruptions?

Ken Gray, a former pilot and intelligence officer who now teaches at the University of New Haven, put the comparison in stark terms. When 9/11 happened, he said, controllers "emptied the airspace out within two hours and got all the aircraft that were in the air on the ground. But once they got it all on the ground, it took several days for it to be safe to allow the aircraft back up."

The lesson for Friday: grounding planes is the fast part. "Once they get everything back on the ground, even if everything is working again, it is going to take some time to get the aircraft back in towards their destinations because everything is out of sync as far as flights go," Gray said. He expects Friday to be the most disruptive travel day since the attacks, with delays and cancellations lasting through the weekend.

Why is a nationwide order so unusual?

Marc Nichols, who served as FAA chief counsel under President Joe Biden, framed the rarity precisely. "Ground stops are not unusual. Nationwide ground stops are a little more unusual," he told Newsweek. Such measures can follow weather, security concerns or system malfunctions — and at this stage, he cautioned, "we should not speculate as to the cause." He noted the transportation secretary's statement points to an air traffic control communications issue, and that "the FAA's primary concern is safety of passengers, and it will share more details with the public when appropriate."

A former senior FAA official separately called the nationwide nature of the order unusual. That two former officials flag the same detail signals how far this sits outside normal operations.

What are airports telling passengers?

Airports are pushing status checks, not closures. John Glenn Columbus International Airport warned passengers flying from CMH or Rickenbacker International (LCK) to check with their airline before leaving home. Ronald Reagan Washington National Airport posted an alert: "Expect flight delays related to a nationwide ground stop reported by the Federal Aviation Administration. Our airport facilities are open."

The key distinction for travelers and agents alike: a ground stop halts flights, not terminals. Airports remain open, and international arrivals continue selectively.

How long could the fallout last?

Nobody knows. The FAA has given no confirmed timeline for a return to normal operations. Even after communications are restored, aircraft and crew schedules are tightly interlocked — late arrivals strand pilots and cabin crew for their next assignments, creating a knock-on cascade of further delays and cancellations across airline networks. The final damage depends on how long the stop holds, how many flights are affected and how fast carriers can rebuild schedules.

Passengers booked Friday evening and through the weekend should monitor airline apps and airport announcements before setting out. Until the FAA announces a cause and a recovery timeline, every projection of when U.S. skies refill is guesswork.