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Southwest Airlines' website was working again after giving travelers fits earlier Tuesday, when it went down for several hours. The glitch also affected online check-in and booking, and some functions were slow to resume.

The airline noted in a travel advisory from around 5 p.m. ET that it is still working on the website issues and travelers may encounter lingering problems.

"We are currently experiencing difficulty with domestic bookings and other website functionality,'' the alert said. "We are working to restore functionality and apologize for any inconvenience. Please try back later.''

The airline's website and mobile app crashed mid-morning Tuesday, according to travelers.

Passengers trying to check in for holiday flights or book or change flights got an error message reading: "We're working hard to get you where you want to be.'' A virtual plane flew by as the website noted, "Please do not refresh your browser. We will automatically transfer you to as soon as possible."

More than 930 of the airline’s flights were delayed as of 10 p.m. ET, representing 24% of Southwest’s daily flight schedule, according to flight-tracking service FlightAware. However, Southwest spokesman Dan Landson said glitch did not impact the carrier's operation. He said the airline's delays on Tuesday resulted from other factors, including construction at Los Angeles International Airport.

Among those affected by the website glitch Tuesday was Chicago business traveler Clarence Hampton, who said he tried to change his return flight online around 12:30 p.m. ET. He tried repeatedly for a few hours with no success, so he headed for Phoenix Sky Harbor International Airport, where he made the changes on a Southwest kiosk.

"It would have been nice if they texted me or something to let me know they were having problems,'' he said. "I kept trying, there was no response. It was just "Oops, try again.' ''

Another traveler, who would not give his name, griped that Southwest's website should be "bulletproof'' this time of year.

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