The Federal Aviation Administration (FAA) imposed ground stops at Newark Liberty International Airport and Philadelphia International Airport on September 21, 2026, affecting hundreds of flights. The outage disrupted air traffic control communication frequencies at the Philadelphia Terminal Radar Approach Control (TRACON) facility, which manages airspace for Newark, Philadelphia, and Teterboro airports.
Flight Delays and Flight Volume Affected
Newark experienced flight delays of up to 150 minutes with average departure delays reaching 105 minutes by late morning and peaking at 124 minutes around noon. By midday, arrival delays at Newark averaged 49 minutes. More than 600 flights combined at Newark and Philadelphia faced delays, representing over 20%
of scheduled traffic. Philadelphia International Airport recorded over 240 flights delayed following the disruption’s start, with Newark’s ground stop extended until at least 1:45 p.m. by the FAA.
Cause Rooted in Philadelphia TRACON Communication Failures
The disruption was caused by failures affecting several communication frequencies at the Philadelphia TRACON, the facility responsible for guiding aircraft near Newark, Philadelphia, and Teterboro airports. These communication issues limited air traffic control capabilities, prompting the FAA to impose regional flight restrictions. The FAA has indicated ongoing staffing constraints at Philadelphia TRACON’s Area C, expected to continue through summer 2027.
Traveler Disruptions and Flight Diversions
FAA enforced ground stops starting at approximately 10:00 a.m. at Newark and
9:48 a.m. at Philadelphia. Several flights were diverted to alternative airports due to traffic restrictions, impacting United Airlines’ hub at Newark and American Airlines’ hub at Philadelphia. Passengers were advised to monitor flight status directly with carriers or consult the FAA National Airspace System status. Continued schedule adjustments remain possible as displaced aircraft and crews are repositioned.
Background and FAA Response
The September 2026 outage follows prior telecommunications failures at Newark and Philadelphia TRACON in 2025. Since then, the FAA replaced telecommunication links between New York and Philadelphia TRACON with fiber-optic connections and installed backup equipment. Despite these measures, the outage exposed ongoing infrastructure
and staffing challenges. FAA Administrator Bryan Bedford reported difficulties switching to backup fiber during the incident.
Official Statements
The FAA confirmed that communication frequency problems at Philadelphia TRACON caused regional air traffic restrictions but did not specify the exact system failure. Officials at Newark advised passengers to check with airlines for up-to-date flight information. Transportation Secretary Sean Duffy has called for increased funding to modernize air traffic control infrastructure in response to such disruptions.
Details Not Yet Disclosed
The FAA has not disclosed the precise technical cause or failure mode of the communication frequency problems affecting Philadelphia TRACON. The exact number of flights canceled remains unspecified.
Investigations into underlying equipment impacts continue.
