Travelers gather at baggage claim station at Newark International Airport in Newark in March. Some passengers may be newly incentivized to stick to a carry-on as airlines increase checked bag fees.

Fuel is airlines’ second-largest expense, and getting even costlier due to the U.S. war with Iran. Airlines are looking for ways to cope, starting by hiking checked baggage fees for most fliers.

(Image credit: Kena Betancur)

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