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

Secretary of Transportation Sean Duffy said Americans should be assured that "you're safe" when flying in the wake of a deadly crash between a commercial airliner and an Army helicopter.

Search efforts continue after an American Airlines plane from Wichita, with 64 people on board, collided with an Army helicopter near Washington, D.C., and crashed into the Potomac River.

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 ...

The U.S. Transportation Department is suing Southwest Airlines and has fined Frontier Airlines over "chronically" delayed ...

Secretary of Transportation Sean Duffy promised to improve the nation's transportation infrastructure and systems after Vice ...

(ABC 6 News) — The U.S. Department of Transportation says it is prepared to take airlines to court over flight delays. The ...

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