On September 21, the Federal Aviation Administration ordered ground stops at Newark Liberty, Philadelphia International, and Teterboro airports after a fiber optic cable was accidentally cut at a construction site in New Jersey. Thousands of flights were delayed by up to two hours.
An FAA equipment outage on 2026-09-21 triggered ground stops at six Northeast airports including Newark Liberty, Philadelphia International, John F. Kennedy, and LaGuardia, causing thousands of flight delays and cancellations. Flights resumed following the outage resolution on 2026-09-22.