The carrier announced Tuesday that it will begin charging certain passengers to check their luggage on flights, a significant shift at the company long prized by consumers for its perks.

Southwest will start charging passengers for checked luggage and sell basic economy tickets, as the maverick airline becomes more like its rivals.

"Bags fly free" was a staple slogan for the Dallas-based airline, which trademarked the phrase in 2012. Members of Southwest's top-tier A-List Preferred rewards status and Business Select fliers will still be able to check two bags for free, and A-List members can check one.