Overview
The Federal Aviation Administration temporarily stopped some inbound flights to Philadelphia International, Newark Liberty and Teterboro airports on Monday after problems emerged with communications at a Philadelphia air traffic control facility that handles traffic for those airports.
Scope of the disruption
Officials said the issue was linked to particular frequencies at a Philadelphia air traffic control facility responsible for managing arrivals and departures to the affected airports. Flight tracking services reported widespread effects on scheduled operations.
FlightAware reported that more than 600 flights tied to Newark and Philadelphia were delayed at the Philadelphia Terminal Radar Approach Control, accounting for over 20% of operations at that facility. The outage also prompted several aircraft to divert to alternate airports.
Flightradar24 provided a further measure of the disruption at Newark, reporting that delays there averaged 112 minutes.
Airline network implications
The impact touched major airline hubs: Newark functions as a major hub for United Airlines, while Philadelphia is a hub for American Airlines. The communications fault therefore had consequences for large carrier networks and their passengers, as reflected in the volume of delayed and diverted flights.
Recent history of outages
This was not the first significant communications failure linked to the same facility. The location experienced several major communications outages in May 2025 that affected operations into and out of Newark airport. The FAA also reported last year that a telecommunications outage disrupted communications and radar displays at the Philadelphia TRACON.
Policy and funding context
Congress approved $12.5 billion last year to modernize the aging air traffic control system and to increase controller hiring, responding to complaints about airport congestion, flight delays and recurring technology problems. That funding aims to address infrastructure and staffing issues that have contributed to recent disruptions.
Note: Information in this article is based on reports from air traffic tracking services and FAA statements describing the communications issues and related operational impacts.