United Airlines suffered a major "technology disruption" on Wednesday night, the carrier has told Newsweek via email, leading to widespread travel chaos in the United States and beyond, and it later warned of "residual delays" even though the underlying issue had been resolved.

United Airlines resumed operations on Wednesday night after a technology issue grounded all mainline flights, leading to over 1,000 delays.

The issue began shortly after 6 pm ET and was fixed within a few hours. However, the impact was widespread. According to FlightAware, more than 1,000 United flights were delayed, and over 40 were canceled as the airline worked to resume normal operations.