United Airlines Resumes Flights After Resolving Technical Issue

United said the problem was related to its UniMatic system, which houses information about each flight and feeds it to other systems.

United Airlines planes sit grounded because of a technical outage at Newark Liberty International Airport in Newark, N.J., on Aug. 6, 2025. Ryan Murphy/Reuters

United Airlines said a technology issue that grounded more than 1,000 flights on Aug. 6 has been resolved.

United said the problem was related to its UniMatic system, which houses information about each flight and feeds it to other systems, including those that calculate weight and balance and track flight times.