The US Department of Transportation is flexing its muscles against airlines who operate chronically late flights.

Southwest is disappointed that DOT chose to file a lawsuit over two flights that occurred more than two years ago," a spokesperson for the airline said.

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

The US Department of Transportation (DOT) has sued Southwest Airlines for allegedly operating numerous "chronically delayed" flights in violation of federal laws prohibiting deceptive practices.

Co. was sued by the US Transportation Department for allegedly violating rules that require airlines to set and meet realistic flight schedules. The carrier was responsible for “unlawful chronic flight delays” that disrupted passengers’ travel plans,

Transportation Department sues Southwest Airlines, seeking over $2.1 million in penalties for chronically delayed flights.

US Government Sues Southwest Airlines and Fines Frontier for Chronically Delayed Flights The Transportation Department is stepping up enforcement of persistent flight delays with a lawsuit against ...

Number seven, Hawaiian Airlines, number six jetblue number five United ... The Transportation Department is stepping up enforcement of persistent flight delays with a lawsuit against Southwest ...

The decision to move Monday's swearing-in means thousands of people with plans to visit Washington won't be able to see President-elect Donald Trump's second inauguration in person.

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.

(ABC 6 News) — The U.S. Department of Transportation says it is prepared to take airlines to court over flight delays. The agency has filed a lawsuit against Southwest, accusing the airline of illegally operating chronically delayed flights and disrupting passengers’ travel plans.

The lawsuit filed in California alleges that Southwest illegally operated chronically delayed flights and disrupted passengers’ travel plans.