Effective 05/28/25, today.

Southwest Airlines has announced that checked bags will cost $35, while a second checked bag will cost $45.
After more than 50 years, Southwest Airlines' "bags fly free" policy is finally coming to an end on Wednesday. The new policy only applies to flights booked on or after May 28, which means today is the last day to book if passengers want to avoid the new fee.
In addition to the checked bag fees, a new flight credit policy will also take effect tomorrow, affecting how long Southwest customers can use their travel vouchers.

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