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

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.

The bag charges will apply to flights booked on or after May 28. Customers with loyalty status will still be able to check one or two bags for free. Southwest Airlines will stop offering two free checked bags to most customers.