Thousands of flights across the United States were delayed or canceled on Monday, September 21, 2026, after construction workers accidentally severed a telecommunications cable. The Federal Aviation Administration (FAA) issued ground stops and halted incoming flights at major East Coast airports, including Newark Liberty International, John F. Kennedy International, LaGuardia, and Philadelphia International. The outage began around 9:45 a.m. and was not fully resolved for approximately eight hours.
The disruption occurred when a crew accidentally cut a fiber line in New Jersey during construction work. According to FAA Administrator Bryan Bedford, the severed cable served as a backup network for the Terminal Radar Approach Control system, which guides planes during takeoff and landing. The error was discovered only after the primary communication circuit at the Philadelphia facility failed. While U.S. Transportation Secretary Sean Duffy initially attributed the damage to an Amtrak crew, New Jersey Transit later stated its own workers were digging at the site. The agency reported that utility markers had been placed incorrectly.
By late Monday afternoon, Secretary Duffy announced that the telecom lines had been repaired and normal operations were resuming, though he warned that delays would persist. FlightAware, a flight-tracking website, reported approximately 7,000 flights were delayed or canceled nationwide, including 1,400 at the three primary New York-area airports. More than 100 flights were diverted to other cities, such as Boston. Newark Liberty International was the most heavily impacted, with more than half of its flights canceled and 524 total delays reported.
The incident has drawn attention to the stability of the U.S. air traffic control system. Secretary Duffy characterized the event as a demonstration of a fragile system and stated that Congress, which awarded $12.5 billion for upgrades last year, needs to approve an additional $17.5 billion to complete modernization efforts. The failure of both primary and backup systems in this instance sets a precedent for concerns regarding infrastructure redundancy. The FAA handles approximately 45,000 flights daily, and officials noted that even localized telecom failures can create a "national ripple effect" that takes hours to resolve.
What happens next: While flight operations resumed late Monday, airlines and transportation officials warned that the backlog of travelers would take time to clear. Secretary Duffy urged all passengers to continue checking their flight status through Tuesday. The FAA is continuing to evaluate the failure of the primary circuit and the subsequent discovery of the backup break, which Bedford estimated could take 13 hours to fully repair. NJ Transit stated it is still investigating whether Verizon or a contractor was responsible for the incorrect utility markings at the digging site.