More than 16,000 flights were canceled across the United States after a rare systemwide ground stop froze departures for hours due to a communications failure, rtl.be reported.
Hundreds of thousands of travelers faced severe disruption at airports nationwide as aviation authorities worked to restore normal operations. The shutdown marked only the third time in decades that the Federal Aviation Administration ordered a national ground stop, following similar actions during the 2001 terrorist attacks and a 2023 computer outage, according to La Libre.be.
Transport Secretary Sean Duffy attributed the failure to an incident during routine infrastructure work. A contractor was replacing an aging copper communication line with fiber optics when a router failure disrupted data links to aircraft and radar systems, he said.
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.
“This instability has continued to spread,” said Federal Aviation Administration head Bryan Bedford, explaining the decision to halt all departures as a precaution.
Terminals filled with makeshift campsites
Terminals filled with makeshift campsites, long lines at ticket counters, and departure boards dominated by cancellations as the disruption stretched into its second day, rtl.be reported. Officials estimated that between 4,000 and 5,000 flights scheduled for Saturday alone would not take off.

Travelers described grueling waits on tarmacs and inside terminal buildings. One passenger at New York’s LaGuardia Airport, Lisa Beraid, told rtl.be that her trip was pushed back repeatedly before being canceled outright.
“It is frankly a mess,” Beraid told rtl.be, noting that her itinerary had shifted from a Friday departure to a newly assigned Monday travel window.
Secretary Mullin: "What it appears to be right now, as Secretary Duffy and FAA was going in and putting patches into the system, they were putting new equipment and new technology and that new equipment and new technology just wasn't, it was overwhelming the older system." pic.twitter.com/giTOcFKrvz
While the Federal Aviation Administration lifted the airspace restriction on Friday evening, carriers struggled to reposition displaced aircraft and flight crews. More than 8,200 flights were grounded on Friday alone, impacting roughly 31% of the day’s scheduled operations, according to data from Cirium cited by franceinfo.
Funding Disputes Over Aging Aviation Infrastructure
The White House asked Congress for an additional $30.1 billion to modernize the aviation system just one day before the outage occurred, rtl.be reported.
Transportation Secretary Duffy pushed for an even larger allocation during a press briefing. “The president has requested $30 billion, but I want $50 billion,” Duffy said, according to rtl.be. “With a completely new, ultramodern system, you will not experience these outages.”
Security officials rejected theories of malicious activity during the incident. “There is no cyberattack, nor any connection to the major Microsoft outage,” said Secretary of Homeland Security Markwayne Mullin, though he stopped short of completely ruling out sabotage, according to Le Soir.

Answers to Common Questions
What caused the national ground stop in the United States?
Transportation Secretary Sean Duffy said that a contractor accidentally severed an aging copper telecommunications line during a routine replacement project, triggering a router failure that disabled radar and communication feeds at multiple air traffic control centers.
Were international flights affected by the system failure?
Yes, the four-hour ground stop disrupted roughly 6,000 flights serving destinations worldwide and left hundreds of thousands of domestic and international passengers stranded at airports, according to Le Soir.
How often does the FAA order a complete ground stop?
National ground stops ordered by the Federal Aviation Administration are extremely rare. Similar nationwide halts occurred during the September 11 attacks in 2001 and during a computer system failure in January 2023.
When will normal flight schedules resume?
Transport Secretary Sean Duffy said that returning the national airspace to a normal operating schedule would take several days as airlines work to reposition grounded aircraft and displaced flight crews.
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