Southwest Airlines customers are waiting in long lines for a second day as the airline tries to solve a technical problem with its electronic booking system. (Reuters)

 

Updated at 9:03 a.m.

Southwest Airlines said it has “stabilized technical issues” that have caused major flight delays across the country.

There were few other details immediately available, but an airline spokesman told Reuters that it had stabilized the issue. Still, even with a fix, travelers are likely to experience some lingering delays Monday as normal operations resume.

The problem began Sunday when the airline had a technical glitch. About 450 of its 3,600 flights were delayed as of Sunday evening, and the airline warned travelers Monday to check in with the airline for details. Travelers were also told to arrive two hours early for their flights.

Original post at 6:30 a.m.

Travelers on Southwest Airlines should expect possible delays Monday after technical problems for the airline’s online network.

Southwest said in a statement late Sunday that it was using back-up systems across the country to check in customers. The airline advised travelers to go to the Web site Southwest.com to check in and print boarding passes before coming to the airport, according to the statement. Customers are advised to arrive two hours before their flights.

On Sunday evening, the airline said a technical glitch led to delays on about 450 of its 3,600 flights. The airline said the issues are systemwide, affecting airports across the country along with the company’s  phone centers, Web site and mobile app. The glitch is forcing employees to manually issue tickets and process flights for scores of customers.

It was not exactly clear when the issue would be resolved, but Southwest officials said technicians are working to try to fix it.