Delays Expected As American Airlines Comes Back Online

The flight monitors at Tulsa International Airprot show the delayed American Airlines depatures.

American Airlines halted all take offs Tuesday afternoon as the company worked out a computer glitch.

The glitch was worked out Tuesday afternoon, but the airline says passengers can expect delays throughout the rest of the day.Flight-tracking service FlightAware estimated that about 900 flights would be delayed if American resumed flying at 5 p.m., and the cascading effect would cause another 800 delays Tuesday evening because planes and crews wouldn't be where they were needed.

Customers couldn't make reservations or rebook if their flight was cancelled. Passengers described long airport lines and frustration at the lack of information from airline employees.

The computer problems come just days after a new report was released detailing that American Airlines had tied with ExpressJet for the worst on-time arrival rate in the industry. Only 77 percent of American flights arrived on-time in 2012.

The Associated Press contributed to this story.