An FAA equipment failure on September 21, 2026, caused ground stops and flight delays at five major airports serving New York City and Philadelphia. John F. Kennedy International, LaGuardia, Newark Liberty International, Philadelphia International, and Teterboro airports all experienced operational disruptions as flights were held on the ground.
At Newark Liberty International Airport, more than 100 flights faced cancellations and delays, impacting roughly 20% of its scheduled operations. Philadelphia International Airport reported delays affecting over 30% of departures and arrivals, with average departure delays near one hour. Teterboro Airport in New Jersey endured delays exceeding three hours as of 1:04
p.m. local time on that day. United Airlines and American Airlines issued travel waivers allowing passengers at Philadelphia International to rebook flights without change fees, although these waivers had not been extended to New York City airports as of the afternoon.
>Cause of Disruption Linked to Philadelphia TRACON Technical Fault
The Federal Aviation Administration attributed the outage to problems with certain frequencies at the Philadelphia TRACON air traffic control facility, which manages airspace around the region’s airports. This facility also oversees flights entering and leaving the New York metropolitan area. The FAA’s National Airspace System Status website confirmed flights were paused due to “issues with some frequencies at Philadelphia
TRACON.” The Philadelphia TRACON site experienced significant technology breakdowns in 2025, which had previously generated multiple disruptions.
Transportation Secretary Sean Duffy cited the Philadelphia TRACON malfunctions from the previous year in calls for a comprehensive modernization of the United States’ air traffic control infrastructure.
>Flight Delays and Airline Responses
The equipment outage rapidly produced cascading effects on flights across the affected region. Newark encountered over 100 flight cancellations and delays, representing near 20% of its daily flights, while Philadelphia International suffered delays to more than 30% of arrivals and departures. By early afternoon, departures from Philadelphia saw average delays of 60 minutes. Teterboro Airport experienced
the longest wait times, exceeding three hours as of 1:04 p.m. local time on September 21.
Major carriers like United Airlines and American Airlines responded by offering travel waivers at Philadelphia International, enabling passengers to rebook flights fee-free due to the disruptions. However, these waivers were not yet announced for flights at airports in New York City.
>Official FAA Statements and Historical Context
The FAA publicly acknowledged the ground stops were necessary “due to issues with some frequencies at Philadelphia TRACON.” This facility’s repeated technological problems have led to significant operational interruptions, highlighting the urgent need for equipment upgrades.
Transportation Secretary Sean Duffy has emphasized the
importance of modernizing air traffic control systems nationwide, referencing the 2025 breakdowns at Philadelphia TRACON as indicative of persistent vulnerabilities.
Similar technical faults have recently disrupted air traffic in other countries as well; a related brief glitch in the United Kingdom caused delays at a key Scottish control center earlier on September 21, following a nationwide airspace disruption two weeks prior.
