This will be the most expensive Labor Day ever for gas. Here are the 10 states with the highest fuel prices — and 10 with the lowest.

Since the beginning of the Iran war in late February and the subsequent closure of the Strait of Hormuz, Americans have been feeling the effects at the gas pump.

After the conflict started, prices rose sharply across the US. AAA data show the national average peaked in May at roughly $4.56 per gallon, then zigzagged through the end of August, averaging $4.09. Now, as average prices continue to creep up, hitting $4.15 on Friday, AAA expects this to be the most expensive Labor Day on record for gas.

To provide a snapshot of where prices stood heading into the holiday weekend, Business Insider used AAA data to calculate the percent change in gas…