United Airlines was forced to temporarily ground all flights on Wednesday morning after experiencing a computer system failure, the Federal Aviation Administration has confirmed.
The outage took place between 6 a.m. and 8 a.m. PDT on Wednesday.
"It was their system, not ours. It was their decision whether they would go up or not. They are now up and running," an FAA representative said.
A total of 24 domestic flights were canceled, and 268 domestic and international flights were delayed by an average of one and half hours, according to United spokeswoman Robin Urbanski Janikowski.
"We do not know the cause of the outage, and it's something that we will investigate. The computer outage affected the systems that United uses to dispatch flights for departure," Janikowski said in an e-mailed statement.
Flights could continue to be delayed as the airline recovers from the outage. United has posted a notice on its Web site recommending that people check the status of their flight(s) before heading to the airport.
"We continue to work hard to resume operations by tomorrow morning and kindly ask for our customers' patience," Janikowski said.