The DOT's moves come weeks after issuing a multi-million dollar fine against JetBlue.

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 ...

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.

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.

New flights have been added for Kansas City and Philly fans, with one airline adding flights on a route it doesn't normally serve.

American Airlines, Frontier Airlines, Southwest Airlines, United Airlines and Delta Air Lines have added a combined 31 new nonstop flights between Philadelphia International Airport (PHL ...

Frontier Airlines is again pursuing a merger with Spirit Airlines, with Spirit mired in chapter 11 bankruptcy proceedings.

Denver-based Frontier Airlines says it’s ready to keep talking after bankrupt Spirit Airlines rejected its offer to merge.

T he rise of budget airlines is good news for travelers—even those who don’t book with them. More flight options mean more competition between airlines, which can lead to lowe

Frontier Airlines is making a second attempt to merge with Spirit Airlines, which filed for bankruptcy in November amid financial struggles.

Frontier said in a release that it has met with Spirit’s board and executives since it made its proposal this month.