The United States Department of Transportation (DOT) announced a lawsuit against Southwest Airlines and a fine against Frontier Airlines as part of a crackdown on how carriers handle flight delays.

Three U.S. senators said they want Frontier Airlines and Spirit Airlines to disclose whether they are manipulating seat fees by using customers' personal information to charge different fees to ...

The Transportation Department announced Thursday it will review the privacy practices of the top 10 airlines in the United States ... Delta, Frontier, Hawaiian, JetBlue, Southwest, Spirit and ...

Frontier, the No. 3 Atlanta carrier, has also been the airport’s fastest-growing airline tenant in recent years.

As recent reports of disasters raise concerns about flying, including one on Monday in Toronto, here's how many US plane ...