The agency is seeking civil penalties against Southwest Airlines, and also fined Frontier Airlines for its continuous delays.

Yesterday, the United States and U.S. Department of Transportation (DOT) disclosed a lawsuit against Southwest Airlines, accusing the airline of chronically delayed flights and interrupting passengers’ travels.

The US Department of Transportation sued Southwest Airlines and fined Frontier Airlines for flight delays, seeking civil penalties against Southwest and imposing a $650,000 fine on Frontier, part of a broader crackdown on airline delay issues.

The Department of Transportation found that Southwest was responsible for 90% of the disruptions on two flights.

The Department of Transportation filed a lawsuit against Southwest Airlines for allegedly operating chronically delayed flights in 2022. It also fined Frontier Airlines for chronic delays.

United States and U.S. Department of Transportation DOT announced a lawsuit against Southwest Airlines (LUV) for illegally operating multiple

The lawsuit alleges Southwest illegally operated chronically delayed flights and disrupted passengers' travel plans.

The U.S. Transportation Department is suing Southwest Airlines and has fined Frontier Airlines over "chronically" delayed flights, disrupting passengers' travel and plans.

The lawsuit alleges Southwest illegally operated chronically delayed flights and disrupted passengers' travel plans.

Having assessed a first-of-its-kind fine for “chronic flight delays” against JetBlue Airways, federal regulators have now moved to penalize both Southwest Airlines and Frontier Airlines for similar infractions.

The DOT is aiming to send a message to all airlines that it will go to court to enforce passenger protections.