Frontier Airlines is stepping up its game. The airline announced Tuesday via press release that it will offer customers a free checked bag on select flights this summer.

Last week, Southwest Airlines announced an end to its long-time policy of two-free checked bags. Frontier officials say customer response will help determine if its free service will become permanent. The promotion is good for Frontier flights departing between May 28 and August 18. You'll need to use the promo code "Free Bag" to get the perk.

Days after Southwest Airlines announced that it will no longer offer two free checked bags to most customers, Frontier has launched a “Your New Love” deal. “Breaking up with your old airline? We're here for you!” according to Frontier’s March 18 announcement.