Frontier's summertime deal appears to be in response to Southwest Airlines, which recently announced it will start charging for checked bags.

The low-cost air carrier is offering a promotion with reduced fares a free checked bag for travel through summer.

Frontier Airlines took a swipe at Southwest Airlines’ plan to start charging for seat assignments and checked luggage by doing the opposite.

The carrier’s latest sale, which dropped on April 1 (April Fools’ Day), is no joke, officials wrote in a press release.

Frontier is again offering a free checked bag on flights departing April 22 through Aug. 18, according to a Tuesday press release.

Frontier Airlines launched a promotion that includes free checked bags, taking aim at rival carrier Southwest, which reversed its long-standing policy.

Frontier Airlines recently announced a new promotion that makes travel with a companion or friends totally free, with its ...

On March 18, the airline announced low fares, free checked bags and free flight changes. Frontier seized the opportunity after Southwest discontinued its long-standing free checke ...

Frontier Airlines is bringing back free checked bags for a limited time this summer. Here's how to get one on a trip out of Nashville.

Frontier and American Airlines have rushed forward with new deals, in the wake of Southwest Airlines' controversial decision ...

Frontier Airlines seems to be taking advantage of a competitor’s recent policy change with the promotion of a temporary ...

Days after Southwest Airlines announced that it will no longer offer two free checked bags to most customers, Frontier has ...