After steady increases for weeks, diesel prices jumped up more than 20 cents per gallon nationwide this week following more Middle East conflict. Trucking’s primary fuel was slightly more expensive at retail pumps on June 23 than it was a year ago, according to the U.S. Energy Information Administration.
On-highway diesel pump prices sat at $3.775 per gallon, up from June 16’s $3.571 average. While it didn’t see the same price hike, average U.S. gasoline prices also increased by more than 7 cents this week, according to EIA, which tracked the fuel at $3.213.
“With Israel and Iran trading attacks over the past week, oil prices have continued to climb —and gasoline prices are following suit, rising at a pace we haven’t seen since last summer,” Patrick De Haan, head of petroleum analysis at GasBuddy, said on June 23. “Few pumps have been immune, with nearly all states seeing gas prices rise over the last week. Additionally, average diesel prices recorded their largest weekly jump since August 2023.”
He added that the U.S. attack on Iran would likely continue the price hike trend at the pumps here. “That said, I do not expect the apocalyptic spikes being circulated by some so-called influencers on social media—many of which are wildly inaccurate.”
But De Haan expects diesel to rise another 10 to 20 cents, while gasoline could climb another 7 to 20 cents in the coming week. He noted that global developments are fluid, and his projections could shift as the week continues.
Here is a look at how the prices of both diesel and gasoline changed regionally across the U.S. as summer officially began and Israel and Iran began a ceasefire in their 12-day war after the U.S. bombed Iranian nuclear program development sites.
How much is diesel across the U.S.?
National average: Diesel is now 0.6 cents more per gallon nationwide than it was when summer started in 2024. Sitting at $3.775 per gallon, the national average is the most expensive it’s been since it was the same price last August 5.
Midwest: For the second week in a row, Midwest diesel prices saw the most significant regional surge. Up 24 cents, diesel prices averaged $3.777 per gallon this week.
Gulf Coast: While still home to the lowest pump prices in the U.S., Gulf Coast states saw diesel pump prices jump 22.4 cents per gallon this week to $3.436 per gallon.
East Coast: Diesel prices along the East Coast are up 16.9 cents per gallon this week to $3.79 per gallon. The most significant increases in this region were among Lower Atlantic states, where diesel jumped 19.3 cents this week to $3.725 per gallon.
West Coast: Diesel is up to $4.458 per gallon this week, a 14.8-cent increase, in western states. If you don’t factor in California, that brings the West Coast’s average down to $4.082 per gallon, 18 cents more than a week ago. In California, diesel is up to $4.893 per gallon, 11.2 cents more than a week ago.
Rocky Mountain: The mountain states are seeing diesel pump prices at $3.689 per gallon, a 14.1-cent increase from a week ago.
How much does gasoline cost in the U.S.?
National average: Regular gasoline prices sit at $3.213 nationwide this week, a 7.4-cent increase from the June 16 figures. However, the retail prices remain 25.5 cents less than they were a year ago this week.
Gulf Coast: The most significant jump in gas prices was a 10.9-cent surge within the Gulf Coast states. At $2.844 per gallon, this region is still home to the most affordable gasoline in the nation.
East Coast: After an average 8.9-cent increase, gas sits at $3.072 per gallon on the East Coast. Its New England subregion saw a 12.3-cent jump to 3.079 per gallon this week.
Rocky Mountain: Gas prices in the Rockies are up 6.3 cents per gallon to an average of $3.177 this week.
Midwest: At $3.087 per gallon this week, Midwest states’ average regular gas prices went up 6.1 cents this week.
West Coast: The smallest increase in gas prices was among Western states, where the consumer fuel price rose 3.5 cents to $4.162 per gallon. If you don’t include California prices, the other western states’ average gas price was up 5.5 cents to $3.855 per gallon. In California, home to the most expensive pump prices in the nation, gas was up just 1.7 cents this week to average $4.444 per gallon.
