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DALLAS (KXAS) -- An outage in the main reservations system of American Airlines has been repaired.

According to a spokeswoman for the airline, Stacey Frantz, the system was fixed around 4:30 Tuesday afternoon. However, flight delays and cancellations are expected throughout the rest of the day, Frantz said.

Tracking service FlightAware reported that American had canceled over 700 flights, and delayed 765as of Tuesday mid-afternoon.

Customers continue to wait in long lines at airports.

Earlier on Tuesday, American Airlines saidits reservation systemwas down and that all flightswere being grounded until5 p.m. ET while they worked to get it running again.

After initially saying their reservation and booking tool, Sabre, was offline, the airline later clarified and said they were unable to access their reservations system and that the issue was not with Sabre.

"We're working to resolve the issue as quickly as we can. We apologize to our customers for any inconvenience," said Mary Frances Fagan, American Airlines spokesperson.

The outagecaused delays nationwide as it affected passenger check-in.

American Airlines arrivalswere on time 89 percent of the time, while departureswere 91 percent on time according to FlightStats.com at the time the system wentdown.

The beleaguered company is emerging from bankruptcy protection and is about to file its reorganization plan as it merges with U.S. Airways.

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