JetBlue Airways is raising bag fees as jet fuel prices soar amid the Iran war. Airfare has climbed for routes around the world since the U.S. and Israel attacked Iran on Feb. 28. The higher fees for checked bags are the most recent sign of airlines passing steeper fuel costs down to U.S. consumers. Jet fuel is airlines' biggest expensive after labor. Fuel prices for Chicago, Houston, Los Angeles and New York averaged $4.57 a gallon last Friday, up nearly 83% since the day before the war began,