American Airlines said Thursday it has settled a federal race discrimination lawsuit filed by three Black men who were ordered to deboard a flight last January.

The Federal Aviation Administration has ordered all American Airlines flights grounded in the U.S. after the carrier reported a technical issue affecting its entire system with millions traveling for the holiday.

The airline was offering customers traveling to or from 12 U.S. cities, including Phoenix, to change their flight for no additional fee if they book by Dec. 24. "We sincerely apologize to our customers for the inconvenience and have issued a travel alert to allow for additional flexibility,

The company said all flights had been grounded over an unspecified technical problem, but the issue was resolved in less than two hours.

While Americans on the east coast brace for snow, on the west coast some are facing flooding and high surf warnings.

Christmas travel is already one of the busiest of the year but was made worse as a "technical issue" forced American Airlines to ground all flights.

American Airlines briefly grounded flights nationwide Tuesday because of a technical problem just as the Christmas travel season kicked into overdrive and winter weather threatened more potential problems for those planning to fly or drive.