United Airlines is working to get its flights running on-time again after major computer problems caused delays and cancellations.
The airline said it solved the technology problems by 6:30 p.m. today. However, passengers were still reporting long lines at some airports.
Some of the airline's key computer systems were down for more than two hours today. And its Web site was not working.
United says it will not charge the usual change fees for passengers on affected flights who want to cancel or rebook their tickets. It apologized for the disruption.
United Continental Holdings Inc. has been struggling with computer issues off and on after combining some of its major computer systems in March.
A United spokesman said the cause of the latest problems was not yet known.