Jet fuel prices in Chicago have surpassed $5 per gallon, making it the most expensive market in the U.S. This surge is attributed to refinery maintenance and disruptions from the ongoing Iran war, which have tightened supply and forced airlines to increase fares and reduce capacity.

• 01Chicago's jet fuel prices have exceeded $5 per gallon, the highest in the U.S.
• 02The Iran war and refinery maintenance are causing significant supply constraints.
• 03Prices in other U.S. markets have risen but not as sharply as in Chicago.
• 04Refinery outages in the Midwest are impacting the supply of various refined products.
• 05Airlines are likely to pass on increased fuel costs to consumers through higher fares.

The surge in jet fuel prices is likely to result in higher airfare for travelers in and out of Chicago, as airlines pass on increased fuel costs to consumers.