Airlines are raising prices for passengers and even canceling flights as they grapple with the jet fuel crisis sparked by the war in Iran . The war, which began on Feb. 28 when the U.S. and Israel launched military strikes against Iran, has led to a global shortage of jet fuel . As a result, the cost of jet fuel has soared around the world; in the U.S., for instance, it has increased by nearly 70% since the start of the war, according to the Argus U.S. Jet Fuel Index . Airlines worldwide are looking to offset the rising costs of jet fuel—one of the most expensive operating costs for carriers—by increasing costs for travelers, including baggage and ticket prices. The average airfare for an international trip from a U.S. point of origin has increased by about 37% since the war began; on April 13, it was $1,064, while it was just $776 on Feb. 23, according to the travel search engine Kayak . U.S. domestic airfare has increased too, from $335 on Feb. 23 to $358 on April 13, according to Kayak.…