Denver gas slips to $3.711 and diesel to $4.452 as summer driving picks up

Denver drivers are getting another small break at the pump. AAA’s June 21 metro check puts regular gas at $3.711 a gallon and diesel at $4.452, both lower than the last reading and both still easing as summer driving picks up.

Regular gas is down 3 cents from yesterday, 29 cents from a week ago, and $1.10 from a month ago. It is still about 64 cents higher than a year ago, which matters for households that are watching every fill-up.

Diesel moved lower too, slipping 4 cents from yesterday and 31 cents from a week ago. It is still the more expensive fuel by a wide margin, which is why the drop matters most for contractors, delivery drivers, fleets, restaurants, and other businesses that burn through fuel quickly. Even after the decline, diesel remains the line item that can swing monthly operating costs for high-mileage users.

How Denver compares with Colorado and the U.S.

Denver is also cheaper than the broader benchmarks right now. AAA’s Colorado average on June 21 was $3.865 for regular gas and $4.609 for diesel. The U.S. Energy Information Administration’s June 16 update showed national averages of $4.052 for regular gas and $5.059 for diesel. That leaves Denver below both the state and national averages on both fuel types.

The gap is not huge, but it is useful. For commuters, a few cents less at the pump adds up over several tanks. For families planning weekend trips, lower Denver prices can trim the cost of driving across town or heading out of the metro. For businesses that run vans, pickups, box trucks, or service fleets, the diesel discount versus the national average is especially worth watching.

What the trend means now

The latest AAA snapshot suggests a modest daily decline, not a spike or supply shock. That fits the broader easing trend described in local reporting earlier this month, when the Denver Gazette cited GasBuddy data showing a sharp weekly drop in local gasoline prices. The current AAA reading shows that relief has continued, even if prices remain above where they were a year ago.

For local readers, the takeaway is straightforward: regular gas is back under $3.75, diesel is still the costlier fuel, and both are now sitting below Colorado and U.S. averages. The relief will not erase fuel budgets, but it can soften summer travel costs and shave a little off the weekly expense for workers and businesses that depend on the road.

If you’re filling up around Denver today, share the highest and lowest pump prices you are seeing in your neighborhood.

Sources

• AAA Colorado fuel prices page
• EIA Gasoline and Diesel Fuel Update
• Denver Gazette fuel-price trend report