If you book a Choice Extra fare flight on Southwest Airlines, you will get two free checked bags. Any other fare class will ...

On some airlines, bag fees remain the same no matter when you pay, but discounters like Spirit and Frontier rise between the time you book your flight and the day of departure. Here’s how fees ...

A pair of other relatively small carriers, Alaska Airlines and Frontier Airlines, also boosted their baggage fee totals in recent years: Alaska hit $151 million in 2012, compared to $109 million ...