The airline anticipates scattered delays.
However, the airlines are now reporting the the issue has been resolved, and schedules are starting to trend that way.
By about 7:45 a.m. the system was back online, he said.
However, the FAA tweeted that the issue had been resolved and travelers should contact their airlines to see if their flight will be delayed. "We apologize to our customers for the inconvenience", American Airlines told Newsweek.
By midday, 3,400 US flights had been delayed, according to tracking service FlightAware, but it was unclear how many were related to the technical issue.
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AeroData's customers include Southwest, American, Delta, United and JetBlue - all airlines that reported delays Monday.
The Federal Aviation Administration said Monday's problem is tied to a flight planning program called Aerodata.
At Birmingham-Shuttlesworth International Airport, at least three departing flights were delayed.
Some of the airlines involved were replying to travelers on Twitter with more information about the delays and explaining the cause for the residual delays.
Airlines saw planes temporarily grounded early Monday morning, after a central system computer outage. Airlines are urging passengers to monitor flight times for changes throughout the day. Airlines say travellers should check online for the latest updates on flights.