Diesel Prices Reach Lowest Level in Nearly Four Months

Diesel Prices Fall for Third Straight Week Across the U.S.

Diesel Prices continued to move lower nationwide this week, providing some relief for trucking companies and owner-operators after months of fuel market volatility.

According to the latest data released on June 22, the national average price for on-highway diesel dropped to $4.832 per gallon. That represents a decrease of 22.7 cents compared to the previous week, when the national average stood at $5.059 per gallon.

The latest decline marks the third consecutive weekly drop in Diesel Prices and brings the national average to its lowest level since the fuel market was disrupted earlier this year by tensions in the Middle East.

Diesel Prices Drop in Every Region

Every major region of the United States reported lower Diesel Prices during the week.

The Midwest recorded one of the largest declines, falling 26 cents to $4.751 per gallon. The Gulf Coast saw Diesel Prices decrease by 23.1 cents to $4.415 per gallon.

The Rocky Mountain region reported a 22.4-cent decline, bringing the average diesel price to $4.795 per gallon.

The largest regional decrease was recorded on the West Coast, where Diesel Prices fell by 26.5 cents to $5.809 per gallon. Excluding California, the West Coast average dropped 28.1 cents to $5.238 per gallon.

California continued to have the highest diesel prices in the nation at $6.468 per gallon, despite a weekly decline of 24.5 cents.

Regional Diesel Prices – June 22, 2026

• U.S. Average: $4.832 (-22.7 cents)
• East Coast: $4.886 (-16.2 cents)
• Midwest: $4.751 (-26.0 cents)
• Gulf Coast: $4.415 (-23.1 cents)
• Rocky Mountain: $4.795 (-22.4 cents)
• West Coast: $5.809 (-26.5 cents)
• California: $6.468 (-24.5 cents)

Gasoline Prices Also Continue Lower

Regular gasoline prices also moved lower across the country.

The national average price for gasoline fell to $3.914 per gallon, down 13.8 cents from the previous week.

The Gulf Coast reported the lowest average gasoline price at $3.437 per gallon, while the West Coast remained the highest at $5.057 per gallon.

The decline in both gasoline and diesel costs comes as crude oil markets have stabilized following recent developments in the Middle East.

Iran Situation Continues to Influence Fuel Markets

Fuel markets remain sensitive to developments involving Iran and the Strait of Hormuz, one of the world’s most important oil shipping routes. Earlier this year, disruptions to traffic through the waterway contributed to significant increases in crude oil and diesel prices worldwide. Analysts described the event as one of the largest oil supply disruptions in modern history.

However, recent diplomatic progress between the United States and Iran has helped ease concerns about global oil supplies. Oil prices have moved lower in recent days as peace negotiations continue and shipping traffic gradually returns through the Strait of Hormuz.

Despite the recent decline in Diesel Prices, analysts continue to monitor the region closely. While crude oil supplies are improving, refined fuel supplies such as diesel remain tighter than normal in some parts of the world, which could limit how quickly fuel prices fall in the coming months.

What Lower Diesel Prices Mean for Trucking

Fuel remains one of the largest operating expenses for motor carriers and independent truck drivers. The latest decline in Diesel Prices could help reduce operating costs during the summer freight season.

Even with the recent decreases, the national average diesel price remains more than $1.05 per gallon higher than it was one year ago, highlighting how global events continue to affect transportation costs across the trucking industry.

For now, truck drivers are seeing some relief at the pump, but fuel markets remain closely tied to developments in global energy supplies and geopolitical events.