American, JetBlue, Alaska Airlines hit by brief computer outage — again

Travelers on American, Alaska and JetBlue airlines ran into travel trouble Monday during a brief computer outage, the second in a month.

Passengers took to Twitter to complain about not being able to check in for flights or book flights among other issues, and lines began to form at some airports as some airlines had to write manual tickets.

The problem, as with a similar incident on March 26, was tied to airline technology giant Sabre, the backbone of airline reservations systems and other critical tech functions. 

In a tweet, Sabre apologized for the global glitch and said it was working to resolve the issue as quickly as possible.

Ask the Captain:Why do major airlines keep having computer issues that delay passengers?

At 2 p.m. Eastern, American Airlines spokesman Ross Feinstein said the airline's systems were back up. 

He said it lasted 45 minutes, compared with 30 minutes during the March outage.

At 2:30 p.m., Alaska said its systems were back up butthat delays were still possible as the airline played catch up.

At 3 p.m., Sabre said all systems are back online and that its airline customers are reporting "normal or close-to-normal operations."

"We sincerely apologize for any resulting travel delays,'' the company said in a statement.