Flying with Southwest Airlines? You'll now need to pay for checked bags. Here's what to know about fees under the new policy.

Times have changed, and one of the pillars of its business model -- "bags fly free" -- has finally fallen by the wayside. Here's what travelers need to know.

Southwest Airlines has put a price tag on checking bags, a coveted free perk that is about to disappear as part of substantial changes the carrier is making to its service.