US Airlines Cancel Over 4,000 Flights as System Struggles to Recover from Historic Shutdown
US airlines canceled over 4,000 flights on Saturday as the aviation system worked to recover from a major communications failure that caused a historic nationwide ground stop on Friday.
By Amir Navarro ·
Major US airlines canceled more than 4,000 flights on Saturday and delayed an additional 3,000 as the nation attempted to recover from the longest nationwide flight shutdown since the September 11, 2001, attacks. The ongoing disruption follows a massive communications failure that forced the Federal Aviation Administration to issue a nationwide ground stop on Friday, halting nearly all departing flights for almost five hours.
Transportation Secretary Sean Duffy addressed the situation at a press conference on Saturday, explaining that the FAA contractor L3Harris was working at a remote location to convert copper lines to fiber optic technology. Duffy stated that officials were still investigating whether the failure resulted from user error, installer error, or a faulty router. He noted that the issue overloaded data at other communications centers, causing significant disruptions to radar and aircraft communication.
The impact on major carriers was substantial. Delta Air Lines, United Airlines, and American Airlines each canceled approximately 20% of their flights on Saturday, while JetBlue canceled 40% of its schedule. Duffy clarified that neither an AI scheduling tool nor cyberattacks were responsible for the initial failure, although he emphasized the need for a broader overhaul of the air traffic control system to prevent similar future incidents.
Although the FAA lifted the ground stop around 8:15 p.m. Eastern Time on Friday, passengers continued to face significant delays. Tens of thousands of travelers remained stranded at airports across the country as airlines worked to clear terminals and reposition flight crews. Many major airports reported they could not handle additional diversions, and several college football teams struggled to find transportation to their Saturday games.
American Airlines indicated it was prioritizing flights to international destinations and smaller cities outside its major hubs to help accelerate the recovery process. The original outage, which began at 3:36 p.m. Eastern Time on Friday, affected a network handling critical radio frequencies used by air traffic controllers to communicate with pilots. L3Harris, the contractor overseeing the network, did not respond to requests for comment regarding the specific technical failure.
This incident highlights growing strain on the US air traffic control system, which faces challenges from aging technology and a shortage of thousands of controllers. On Friday, Transportation Secretary Sean Duffy called for $50 billion to upgrade these systems, increasing the previous request of $30 billion. He described the situation as an emergency and urged Congress to provide the necessary funding to fix the incredibly old infrastructure.
Homeland Security Secretary Markwayne Mullin stated that there was zero evidence so far linking the outage to a cyberattack or a rogue AI system, though investigators had not entirely ruled out those possibilities. The National Security Agency is collaborating with the Department of Homeland Security on the investigation. Duffy noted that while the immediate problem was fixed and flying was safe, the underlying issues required long-term solutions.
Passengers experienced significant inconvenience from Boston to Seattle and New York to Los Angeles, with departure halls crowded and aircraft parked at gates. Louise Maher, a 47-year-old traveler stuck at Newark Liberty International Airport, shared her frustration regarding her disrupted British Airways flight to London. Since the FAA caused the delays, airlines are not required to compensate stranded passengers.
The previous nationwide ground stop occurred in January 2023, when domestic departures were halted for about 90 minutes. Financial markets have already reacted to the disruption, with shares of American, United, and Delta falling between 1% and 2% in after-hours trading late Friday. JetBlue Airways shares dropped approximately 3%, while L3Harris shares traded down about 3% after hours.
