Frontier is offering a "divorce your old airline" deal after Southwest ends its longstanding "bags fly free" policy.

Two bags fly free’ set the airline apart from others. Now, see what they’re all charging non-rewards members to bring baggage.

Southwest allows passengers to check up to two pieces of baggage for ... Passengers can bring one free carry-on bag, such as a roller bag or small suitcase. Carry-ons have a size limit of 24 ...

Each free checked bag can be no heavier than 50 pounds ... Passengers can bring one free carry-on bag, such as a roller bag or small suitcase. Carry-ons have a size limit of 24 inches in length ...