American Airlines said Thursday that it resolved the technical issue that led to the ground stop at several major U.S. airports.
"We apologize for the inconvenience and are working to get our customers on their way as soon as possible," the airline said in a statement.
Airline spokesman Casey Norton said that the outage began around 11 a.m. CDT.
The Federal Aviation Administration said American planes destined for Dallas-Fort Worth International Airport, O'Hare Airport in Chicago and Miami International Airport were held on the ground.
The Associated Press contributed to this report