Flight credits issued for Basic fare tickets purchased on or after May 28 will expire after six months.

Flight credits for pricier fares will expire after a year.

Why is Southwest changing its policy?

In a word: profitability.

Charging for checked bags offers an additional revenue stream for the airline.

What can you do to avoid checked bag fees?

A-List Members and other “select” customers will enjoy one free checked bag.

Rapids Rewards Credit Card members will receive a statement credit for one checked bag.

If you aren’t loyal to Southwest, otherairline credit cardsalso reward cardholders with perks like free checked bags.

Terms apply to American Express benefits and offers.

Enrollment may be required for select American Express benefits and offers.

And if all else fails, consider packing lighter tofit your travel wardrobe in a carry-on.

“Use compression cubes and vacuum bags to save space,” said Mariana Mendoza ofVibe Adventurestravel agency.

“Choose a suitcase with compression straps and expandable compartments to help you fit more into your carry-on.”