ToplineUnited Airlines increased its fees on checked bags Thursday, according to multiple reports, becoming the latest carrier to up the cost of checked bags as airlines grapple with higher jet fuel costs amid the war with Iran.A United Airlines Airbus A321 arrives at Los Angeles International Airport from Denver on March 7, 2026 in Los Angeles, California.Photo by Kevin Carter/Getty ImagesKey FactsChecking a first or second bag with United will cost an additional $10, reaching $45 if customers pay ahead and $50 if they pay within a day of their departure, according to CNBC.The increase applies to customers traveling in the U.S., Mexico, Canada and Latin America, the Wall Street Journal reported.The hike in fees comes just a few days after JetBlue increased its checked bag fees by at least $4, with some bag fees reaching as high as $9 higher than before the announcement.Forbes has reached out to United for comment.Surprising FactJet fuel prices more than doubled between Feb. 27, shortly before the U.S. and Israel launched strikes against Iran, and March. 27, according to the International Air Transport Association.Big NumberUnited shares tumbled over 3% on Thursday, closing at $92.21. The airline’s stock is down 17.5% since the start of the year, when it traded at $113 per share.TangentAmazon will charge third-party sellers a 3.5% “fuel and logistics” surcharge beginning April 17 as shipping companies also navigate higher fuel costs.Key BackgroundSince the start of the war with Iran, crude oil prices have surged more than 65%, reaching well over the $100 a barrel mark Thursday after President Donald Trump used a Wednesday night address to the nation to reiterate talking points around Iran, rather than lay out new objectives. The president did not provide a clearer picture on when U.S. involvement in the war may end after saying earlier in the week the U.S. would withdraw in two to three weeks. As rising oil prices press American travel and shipping companies, consumers have also felt pain at the pump. The average price for a gallon of gas in the U.S. reached $4.08 on Thursday, according to GasBuddy data. The surge marks a roughly 37% increase in cost when compared to prices before the war with Iran.Further ReadingTrump Offers Few New Details On Iran War In Prime Time Speech—Dow Futures Drop By 500 Points (Forbes)