FAA Equipment Outage at Philadelphia TRACON Halts Newark, Philadelphia and Teterboro Flights; Disruption Spreads to LaGuardia and JFK

An FAA equipment outage on Monday, September 21, 2026, halted flights into Newark Liberty International Airport, Philadelphia International Airport and New Jersey's Teterboro Airport, with the disruption later spreading to New York's LaGuardia and John F. Kennedy International airports. The agency attributed the pause to "issues with some frequencies at Philadelphia Terminal Radar Approach Control (TRACON)," according to CNBC and Express.co.uk.

What the FAA Said Happened

An FAA spokesperson said: "The FAA is pausing flights into Philadelphia International, Teterboro and Newark Liberty International airports due to issues with some frequencies at Philadelphia Terminal Radar Approach Control (TRACON)." That TRACON facility guides aircraft in and out of both Newark and Philadelphia and, according to Express.co.uk, manages a significant portion of the traffic in that airspace.

Disruption Spreads to New York

By roughly 1 p.m. ET, the problem had widened beyond the initial three airports. CNBC reported that the FAA also halted flights into LaGuardia Airport and John F. Kennedy International Airport as the frequency issue rippled through the Northeast Corridor's tightly linked airspace.

Flight Toll: Delays and Diversions

The scale of the disruption was substantial by midday. Citing FlightAware, CNBC reported roughly 250 flights in and out of Newark were delayed, more than a fifth of the day's schedule. Separately, Express.co.uk cited a FlightAware tally showing more than 300 delayed flights, or about 15%, across Newark and Philadelphia combined.

Diversions compounded the disruption. CNBC, citing Flightradar24, reported that as of about 1 p.m. ET, 67 flights bound for Newark had been diverted, including international arrivals from Iceland, Egypt, Greece, Spain and France. Specific examples included a United flight from Berlin sent to Detroit Metropolitan Wayne County Airport and an SAS flight from Stockholm bound for Newark rerouted to Washington Dulles International Airport.

Comparing the two Newark figures reported by CNBC — roughly 250 delayed flights, per FlightAware, and 67 diverted flights, per Flightradar24 — the delay count exceeded the diversion count by 183 (250 minus 67), a relative difference of about 273% (183 divided by 67, multiplied by 100). That arithmetic is our own calculation based on the two reported figures, and the reading of it is interpretation: it indicates that most affected Newark traffic was held or delayed rather than rerouted. The two metrics are not directly interchangeable, however, because one counts all Newark arrivals and departures running late while the other counts only inbound flights sent elsewhere.

Separately, Express.co.uk reported that departures from Newark and Philadelphia were experiencing delays of up to 150 minutes, according to the FAA's website.

Airline and Airport Response

United Airlines, whose busiest international hub is Newark, waived flight change fees for travelers affected by the disruption, according to CNBC. A Newark Airport spokesperson told Express.co.uk: "Due to an FAA equipment outage, arrivals and departures are currently delayed at EWR. Please contact your airline for flight status."

Cause Still Unclear

As of the reporting, an explanation for the technical failure had not been released, and it remained unclear how long the issue would take to resolve, per Express.co.uk. Passengers scheduled to fly were urged to contact their airlines directly for updated flight status.

A Recurring Strain on Aging Air Traffic Control Systems

Aging air traffic control equipment and related technology issues have troubled airline executives for years, CNBC noted. The Trump administration last year announced a multibillion-dollar overhaul of U.S. air traffic control equipment and resources, and the FAA continues to promote a $12.5 billion air traffic modernization project, according to the agency's own site, faa.gov.

The timing is notable: hours before Monday's outage, the Transportation Department and FAA had unveiled a new artificial-intelligence-powered tool called SMART, which centralizes 200 data streams to generate recommendations aimed at improving airspace management and flight scheduling, rolled out first in Washington, D.C., per CNBC and the FAA's own materials.

Monday's Philadelphia TRACON failure was not an isolated event. In a separate incident the same day, a "connectivity issue" at NATS' Prestwick centre grounded flights at airports in Scotland, Northern Ireland and northern England, with Cirium data cited by Express.co.uk showing easyJet as the most affected carrier, with 47 flights, or 7% of its 670 scheduled UK departures that day, cancelled. Earlier in the year, on May 9, 2026, an air traffic control equipment malfunction triggered an approximately 90-minute complete ground stop at Washington Dulles that also disrupted Reagan National and Baltimore/Washington airports, delaying 106 flights and cancelling three at Dulles alone, according to TravelTourister.

Bottom Line

Monday's frequency failure at Philadelphia TRACON forced the FAA to pause arrivals at Newark, Philadelphia and Teterboro before the disruption spread to LaGuardia and JFK, delaying roughly 250 to 300-plus flights and diverting close to 70 aircraft bound for Newark, per FlightAware and Flightradar24 data cited by CNBC and Express.co.uk. United waived change fees for affected travelers, but as of the reporting the FAA had not disclosed the root cause of the equipment failure or a timeline for full resolution. The episode adds to a string of 2026 ATC equipment incidents that continue to test aging U.S. air traffic infrastructure even as federal modernization funding remains in progress.