A telecommunications malfunction at a critical air traffic control center brought operations to a halt across several airports in the northeastern United States on Monday. This disruption led to hundreds of flight cancellations and delays, impacting thousands of passengers for several hours, as reported by Telemundo.
The Federal Aviation Administration (FAA) issued ground stops at Newark Liberty, Teterboro, and Philadelphia airports due to capacity issues. Meanwhile, operations at JFK and LaGuardia were also suspended. The problem originated at the Philadelphia TRACON center, which manages air traffic in the northeastern region.
The issue began when a main telecommunications circuit failed in the morning. Upon switching to the backup system, technicians discovered that the fiber optic line had been inadvertently severed. Transportation Secretary Sean Duffy pointed to an Amtrak construction crew as responsible for the cut, which occurred in New Jersey.
Newark Liberty bore the brunt of the disruption, with around 500 arrivals and departures canceled, over a third of its scheduled operations for the day. According to Reuters, by 2 p.m. Eastern Time, 21% of flights were canceled and 20% were delayed at the airport.
United Airlines announced the cancellation of all domestic flights—both mainline and United Express—departing from or arriving at Newark for the remainder of the day, prioritizing only pending international departures. The airline issued a travel waiver allowing affected passengers to change their itineraries without additional fees.
"We understand this disruption is a significant inconvenience for our customers. Once resolved, we will work to get them to their destinations safely," stated the company in a communication.
FAA Administrator Bryan Bedford warned that repairing the severed fiber could take considerable time. "Repairing that fiber break will likely take 13 hours. It's a major outage," he declared, according to a video shared by a CBS transportation journalist. Verizon reported that its technicians were working to restore service as quickly as possible.
The incident occurred at a peak operational time: dozens of foreign leaders were traveling to New York for the United Nations General Assembly. However, President Donald Trump's flight from Washington to New York managed to depart as scheduled.
This is not the first time these facilities have caused aviation chaos. The same Philadelphia TRACON previously caused significant disruptions at Newark in the spring of 2025, when controllers lost contact with aircraft for about 30 seconds and radar screens went dark for nearly 90 seconds. In response, the FAA installed new fiber optics between Newark and Philadelphia, but Monday's events exposed the continued vulnerability of that infrastructure.
By early afternoon, flights began to gradually resume at LaGuardia and Philadelphia, while Newark, JFK, and Teterboro remained paralyzed. The FAA advised travelers to check with their airlines for flight status before heading to the airport.
The primary circuit that failed was scheduled for replacement as part of the national air traffic control system's modernization, a process the agency has been trying to accelerate amidst an infrastructure dealing with decades of technological delays.
Understanding the Air Traffic Disruptions in the Northeast U.S.
What caused the flight delays in the northeastern U.S.?
The flight delays were caused by a telecommunications failure at the Philadelphia TRACON air traffic control center, which manages regional traffic in the northeastern U.S.
How did the FAA respond to the situation?
The FAA issued ground stops at Newark Liberty, Teterboro, and Philadelphia airports and advised travelers to check flight statuses with their airlines.
What steps were taken to address the fiber optic issue?
Technicians from Verizon worked to repair the severed fiber optic line, with estimates indicating the repair could take up to 13 hours.