A Verizon fiber optic cable was severed on September 21, 2026, during a rail project construction in New Jersey, causing both primary and backup data feed failures at the Federal Aviation Administration’s Philadelphia Terminal Radar Approach Control facility. This outage cut radar and radio communications that support air traffic control for the Northeast corridor including Newark Liberty International, JFK, LaGuardia, Philadelphia International, and nearby smaller airports.
Northeast Airports Face Flight Disruptions
The communication failure forced the FAA to implement ground stops and halt arrivals at major airports in New York City and Pennsylvania, notably Newark Liberty International Airport, which experienced no commercial landings for about
eight hours starting late morning on September 21. Delay and cancellation cascades affected Newark, JFK, LaGuardia, Philadelphia International, and Teterboro Airport in New Jersey.
Flight Delays, Cancellations and Diversions
FlightAware reported over 600 flights were delayed or cancelled at Newark Liberty International on September 21. Philadelphia International recorded roughly 400 delayed flights and 200 cancellations the same day. Additionally, more than 100 flights bound for Newark were diverted to secondary airports including Detroit Metropolitan Wayne County Airport and Washington Dulles International Airport, according to FlightRadar24.
Passengers faced long waits, extended tarmac holds, and missed connections. Airlines scrambled to accommodate travelers through rebooking and hotel arrangements
amid crowded terminals and long lines.
Official Statements on Cause and Response
FAA Administrator Bryan Bedford confirmed on September 21 that the primary telecommunications circuit at the Philadelphia facility failed first and the backup fiber was also cut, stating, “when it went to flip into the backup, we discovered the backup fiber had a break.” NJ Transit acknowledged that a construction crew working near utility markings accidentally severed the fiber optic cable during a rail project between New Brunswick and North Brunswick, New Jersey.
A Verizon spokesperson said, “Construction contractors working in the area dug up and cut our cable,” but emphasized, “Verizon’s facilities were fully
functional up to that point. Verizon bears no responsibility for this incident.” Transportation Secretary Sean Duffy confirmed flights resumed after repairs and stressed infrastructure modernization to prevent future failures.
National Impact and Repair Progress
By late September 21, the damaged fiber optic lines had been repaired, allowing the FAA to begin restoring normal radar and communications services. Despite this, airlines faced operational challenges in rebalancing aircraft and crew, causing delays to persist into the following day. Flight disruptions cascaded nationally, with FlightAware reporting nearly 4,000 delayed and close to 500 canceled flights across the United States on September 21. On the West Coast, San Francisco
International Airport experienced over 400 delays due to flights being held or placed in holding patterns.
Infrastructure Vulnerabilities and Modernization Efforts
The outage exposed a critical single point of failure in the FAA’s air traffic control communications, affecting one of America’s busiest air corridors. This incident coincided with the FAA and Department of Transportation’s rollout of the Strategic Management of Airspace, Routes and Trajectories (SMART) AI traffic management platform but was unrelated to the new software. The event highlights contrasting challenges between adopting advanced traffic management technology and the need to upgrade aging physical infrastructure.
In 2025, Congress allocated approximately $12.5 billion to modernize the
FAA’s telecommunications and automation systems after multiple equipment failures, including previous outages at Philadelphia and other cities. The September 21 incident is likely to intensify calls for further investment to eliminate network choke points and improve redundancy.
Airlines Waive Change Fees Amid Disruptions
United Airlines described the outage as a technology failure affecting all carriers operating in the Northeast. The airline waived change fees for passengers impacted by flight disruptions and offered additional pay for crews managing Newark flights during the disorder. American Airlines also waived change fees and permitted customers to use alternate airports out of Philadelphia to accommodate travel plans.
