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.

One of the more beloved perks for flying Southwest Airlines is set to sunset. The airline announced Tuesday that it’s dropping its standard two free checked bags for all travelers. Instead, only members of its A-List program or business select flyers will retain the two luggage bonus while A-List members are allowed one free checked bag.

Southwest Airlines will now charge customers to check bags, with fees set to go into place as the busy summer travel season kicks off. The Dallas-based airline set itself apart from others for years by offering all customers two free checked bags.

Southwest Airlines said Tuesday that it will begin charging customers a fee to check bags, abandoning a decades-long practice that executives had described last fall as key to differentiating the budget carrier from its rivals.