A damaged Verizon fiber optic line severed radar and radio links at the Federal Aviation Administration’s Philadelphia Terminal Radar Approach Control (TRACON) facility on September 21, 2026, disrupting air traffic management across the Northeast corridor.
Newark, JFK, Philadelphia and Surrounding Airports Severely Affected
This outage impacted radar and radio communications for flights bound for Newark Liberty International Airport (EWR), John F. Kennedy International Airport (JFK), LaGuardia Airport (LGA), Philadelphia International Airport (PHL), as well as smaller New Jersey and Pennsylvania airports including Teterboro. More than 600 flights were delayed or canceled at Newark by 6 p.m., with close to 100 additional delays, while Philadelphia reported over 200 cancellations
and more than 400 delays on the same day. Nationwide, nearly 4,000 flights faced delays and close to 500 were canceled as the disruption cascaded beyond the Northeast.
Immediate Operational Response and Flight Ground Stops
The FAA issued ground stops at New York City-area airports, pausing most inbound flights especially at Newark, where arrivals were suspended for roughly eight hours. Air traffic controllers lost digital radar displays and radio connectivity due to the fiber optic failures, forcing suspension of most arrivals and implementation of slower, backup air traffic procedures that required increased aircraft spacing and reduced arrival rates.
Airline Measures Mitigating Passenger Impact
United Airlines, with a major hub at Newark, waived
flight change fees for affected travelers and offered accommodations including travel via alternative airports and extra pay incentives for staff to manage disruptions. American Airlines, operating a hub at Philadelphia, similarly waived change fees and permitted customers to use other nearby airports. Over 100 flights originally destined for Newark were diverted to secondary airports including Detroit Metropolitan Wayne County and Washington Dulles International Airports.
Repair Efforts and Ongoing Schedule Disruptions
Repairs to the severed fiber optic lines were completed by Monday evening, September 21, with service restoration underway. However, schedule disruptions persisted into September 22 as airlines repositioned aircraft and crews. Flights at San Francisco International
Airport were also delayed, experiencing over 400 delays due to cascading effects from the Northeast outage.
Cause and Official Statements
NJ Transit attributed the outage to a construction crew working in New Jersey, approximately 10 feet from utility markings, that “accidentally severed a fiber-optic cable while working at the site.” Verizon stated its facilities were fully functional prior to the incident and denied responsibility, explaining that “construction contractors working in the area dug up and cut our cable.” FAA Administrator Bryan Bedford said, “when it went to flip into the backup, we discovered the backup fiber had a break,” leaving no operational redundancy. Transportation
Secretary Sean Duffy posted that flights were resuming after repairs and called for additional funding to modernize infrastructure.
FAA Infrastructure Vulnerabilities and Modernization Efforts
The incident exposed a critical single point of failure within one of the country’s busiest air traffic corridors. Both the primary and backup fiber optic lines serving the Philadelphia TRACON failed, reflecting vulnerabilities and aging equipment in the FAA’s telecommunications network. In 2025, Congress allocated $12.5 billion towards aviation infrastructure modernization to address longstanding system weaknesses, including recurrent radar and telecommunications outages across FAA facilities in Philadelphia, Dallas, and Minneapolis.
