Hundreds of flights were canceled across the U.S. Northeast on Monday due to technical problems at a Federal Aviation Administration (FAA) regional air traffic control center in Philadelphia. The disruptions halted operations at major airports in the New York City area for several hours, coinciding with the arrival of foreign leaders for the United Nations General Assembly.
The incident occurred when a circuit on the primary data line at the Philadelphia facility failed. Attempts to switch to the backup system were thwarted when personnel discovered that the fiber optic line had been severed. Transportation Secretary Sean Duffy attributed the cut to an Amtrak construction crew.
The outage impacted flights for Philadelphia, Newark Liberty International Airport, John F. Kennedy International Airport, and LaGuardia Airport. By early afternoon, some flights began to resume at LaGuardia, Kennedy, and Philadelphia, but significant delays were anticipated throughout the remainder of the day. Some airlines offered passengers the option to change their flights without penalty, while the FAA advised travelers to check their flight status directly with their airline.
FAA administrator Bryan Bedford stated that the agency was working to restore the primary connection by installing a new circuit and to repair the backup fiber optic line. The timeline for full restoration remained unclear. Verizon confirmed its technicians were also working to repair the severed line, with Bedford estimating the fiber break repair could take approximately 13 hours. He indicated that the primary line might be operational before the fiber repair is complete.
This primary circuit was scheduled for replacement as part of the broader overhaul of the nation's air traffic control system. Separately, the FAA has begun testing a new AI-powered computer system in the Washington, D.C. area to help predict schedule conflicts and weather issues for air traffic controllers, though this system is not linked to Monday's disruptions.
This is not the first time the Philadelphia FAA facility has experienced issues; it previously caused significant disruptions at Newark Liberty International Airport in the spring of 2025.