New Delhi, April 4 -- Most travelers flying with United Airlines will pay $10 more to check their luggage beginning on Friday, as higher jet fuel costs driven by the war in the Middle East push another major U.S. carrier to increase fees.

The first piece of checked luggage will now cost customers $45 on flights within the United States, Mexico, Canada and Latin America, according to United. A second bag will cost $55.

"This is the first time in two years the airline has raised bag fees," United said in a statement.

Speaking to investors last month, United CEO Scott Kirby said the rising costs for jet fuel since the conflict began on Feb. 28 had already added roughly $400 million to operating costs. The CEOs for Delta Air Lines and Amer...