Denver Gas Prices Hold Above $4 as Diesel Eases but Stays Above $5

Denver regular gasoline and diesel moved in opposite directions in AAA’s July 31, 2026, metro price check. Regular gas rose slightly to $4.152 per gallon, while diesel eased to $5.133.

The separate movements still leave both fuels well above their prices from one month and one year earlier, keeping pressure on driving budgets and fuel-dependent businesses across the Denver area.

Regular gas edges higher

AAA’s Denver metro average for regular gasoline increased 0.8 cents from the prior day and 2.8 cents from the prior week.

The larger comparison is over time. Regular gas was up 48.1 cents from one month earlier and $1.211 from one year earlier. For a driver filling a 15-gallon tank, the year-over-year difference works out to more than $18 for a single fill-up, before considering changes in driving distance or vehicle efficiency.

The AAA figure is a metro average rather than a guaranteed price at every Denver station. Drivers may see meaningful differences between nearby pumps, making local comparison worthwhile before filling up.

Diesel falls from the prior day but remains above $5

Diesel moved lower in the latest daily check, falling 3.7 cents from the prior day to $5.133 per gallon. It was still 10.4 cents higher than a week earlier.

Diesel also remained substantially more expensive than it was earlier in the summer. AAA listed the Denver metro average as 83.4 cents higher than one month ago and $1.678 higher than one year ago.

That matters beyond personal vehicles. Diesel is commonly used by delivery operators, contractors, construction equipment, commercial fleets and other businesses that move people, supplies or materials. Sustained costs above $5 can become an expense to watch when companies set delivery charges, service prices or project estimates.

How the daily and weekly readings compare

The U.S. Energy Information Administration’s weekly data provides a separate benchmark from AAA’s daily Denver metro averages. For the week ending July 27, EIA listed Denver gasoline at $4.033 per gallon. Its Rocky Mountain regional diesel reading was $5.141 per gallon.

Those figures should not be treated as interchangeable with AAA’s July 31 Denver snapshot. EIA reports a weekly city or regional series, while AAA’s figures show a more recent daily metro average. Together, they show that Denver-area gasoline was above $4 in both measures and that Rocky Mountain diesel remained above $5 in the latest weekly data.

What higher fuel costs can mean locally

For commuters, the immediate effect is a larger share of household income going toward regular fill-ups. Families with longer drives, multiple vehicles or frequent weekend travel may feel the increase more quickly.

Fuel costs can also work through local businesses. Contractors may face higher operating costs for trucks and equipment. Delivery companies and restaurants may need to account for fuel in transportation and supply expenses. Plumbers, electricians, landscapers and other service businesses may watch mileage and vehicle costs when pricing jobs.

Individual station prices can vary widely across Denver, so comparing nearby pumps remains important. Share the highest and lowest prices you are seeing locally.

Sources

• AAA Fuel Prices — Colorado metro averages
• U.S. Energy Information Administration — Gasoline and Diesel Fuel Update