Most travelers flying with United Airlines will now pay $10 more to check their luggage beginning on Friday, as rising jet fuel costs driven by the war in the Middle East pushes another major U.S. carrier to increase fees. Customers traveling in the United States, Mexico, Canada and Latin America will now pay $45 for their first piece of luggage and $55 for their second bag, according to United. “This is the first time in two years the airline has raised bag fees,” United said in a statement.