The Transportation Department is stepping up enforcement of persistent flight delays with a lawsuit against Southwest Airlines and a fine against Frontier Airlines. The agency said the U.S ...

Southwest is optimistic about achieving ambitious goals in 2025 but "a lot depends on Boeing," CEO Bob Jordan says.

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.

An American Airlines jet carrying 64 people collided Wednesday with a helicopter near Reagan Washington National Airport, ...