After Southwest Airlines recently stunned its loyal customers by canceling its free-checked-bags policy, Frontier Airlines didn't waste anytime changing its own policy - by offering free checked bags.

Frontier Airlines makes major bag policy change in jab at Southwest - Frontier announced two deals for passengers booking travel this week in response to Southwest’s policy changes

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