America's Skies Freeze: FAA Grounds Every Departing Flight in Rare Nationwide Halt

Passengers wait at airport gates. The FAA ordered a nationwide ground stop on Friday after a communications failure hit air traffic control centres. (Photo: Pexels — representative image)

On Friday afternoon, the United States did something it almost never does — it stopped every single aeroplane from taking off. At 3:54 p.m. Eastern Time, the Federal Aviation Administration (FAA) ordered a nationwide ground stop after a communications failure hit air traffic control centres across the country. Planes already in the air were allowed to land, but nothing on the ground could leave. For more than four hours, the busiest aviation system in the world stood still.

A Shutdown Ordered in Minutes

The FAA's order was blunt: all departing traffic at every airport in the United States was to remain on the ground until further notice, citing "extraordinary circumstances" and "reasons of safety". At the moment the order was issued, 4,042 flights were already airborne and heading for American airports, according to flight-tracking service Flightradar24. Those aircraft were allowed to complete their journeys and land. But behind them, departure boards across the country turned red. The ground stop was lifted at about 8:15 p.m. Eastern Time, roughly four and a half hours after it began — though the knock-on delays ran long into the night.

Thousands of Flights Cancelled or Delayed

The scale of the disruption was enormous. FlightAware counted more than 1,000 cancelled flights and nearly 10,000 delays on Friday, while Flightradar24 put the number of cancellations above 4,700, with more than 700 flights already cancelled for Saturday. Passengers waited for hours in terminals from New York to Las Vegas, many of them taken off planes that never left the gate. International flights were handled case by case, and Air India warned passengers travelling to and from the United States to expect disruption. Airlines said they had received no clear indication of when normal operations would resume.

Overloaded Switches, Not a Cyberattack

So what went wrong? Transportation Secretary Sean Duffy said the outage was caused by overloaded switches and routers that began sending inconsistent data and then shut down. Homeland Security Secretary Markwayne Mullin said the failure happened while new equipment and technology were being installed — and the new systems overwhelmed the older ones. "The FAA issued a nationwide ground stop for all US airports following a communication issue impacting all Air Route Traffic Control Centers," Duffy said. "FAA technicians are investigating the issue." Officials were quick to rule out foul play: the Department of Homeland Security said there was no indication of a cyberattack, and the FBI does not believe the outage was caused by a cyberattack or criminality. President Donald Trump was briefed on the situation.

An Ageing System Under Strain

The timing was awkward. Just a day earlier, Duffy had formally asked Congress for 30.1 billion dollars to upgrade and modernise America's air traffic control system. Old equipment has disrupted American flights repeatedly in recent years — the last comparable nationwide halt came during a system outage in January 2023. Friday's shutdown was a reminder that the technology guiding the world's busiest skies is, in places, decades old. The FAA has not yet said what permanent fix it will make, or how long the investigation will take.

By late Friday night, planes were moving again — but for thousands of travellers, the damage was done: missed connections, ruined weekends and nights spent on terminal floors. A few hours of silence in the sky had shown how fragile the system can be.

Have you ever been stuck at an airport because of a flight grounding? Tell us your story in the comments.