Diesel Prices in Colorado Today
Average diesel price in Colorado: $6.220 per gallon on September 22, 2026. U.S. average $6.529. Updated daily.
What is the price of diesel in Colorado today?
Diesel in Colorado averages $6.220 per gallon today (September 22, 2026), $0.309 less than the U.S. average of $6.529. Colorado ranks #10 of 51 for cheapest diesel (1 = cheapest). A loaded semi at about 6.3 mpg spends about $0.99 per mile on fuel in Colorado.
per gallon today
U.S. average $6.529
of 51 (1 = cheapest)
semi truck, today
Fuel cost per mile in Colorado
Estimated diesel cost at today's Colorado price of $6.220 a gallon, using fuel economy calibrated to FHWA and NACFE data.
| Truck | Fuel per mile | Fuel per 1,000 miles |
|---|---|---|
| Dry Van38,000 lbs, ~6.3 mpg | $0.99 | $989 |
| Reefer38,000 lbs, ~6.0 mpg | $1.03 | $1,030 |
| Flatbed40,000 lbs, ~6.0 mpg | $1.03 | $1,028 |
| Hotshot12,000 lbs, ~8.9 mpg | $0.70 | $698 |
| Box Truck7,000 lbs, ~9.1 mpg | $0.68 | $682 |
Your numbers depend on load weight, speed, terrain and idling. Enter them in the truck fuel cost calculator for an exact estimate.
Frequently asked questions
What is the price of diesel in Colorado today?
Diesel in Colorado averages $6.220 per gallon today (September 22, 2026), $0.309 less than the U.S. average of $6.529. Colorado ranks #10 of 51 for cheapest diesel (1 = cheapest). A loaded semi at about 6.3 mpg spends about $0.99 per mile on fuel in Colorado.
How much does it cost to fill a semi truck in Colorado?
At $6.22 a gallon, 150 gallons of diesel costs about $933 and 200 gallons about $1,244 in Colorado today.
Is diesel cheaper in Colorado than nearby states?
Among nearby states in the same region, the cheapest today is Wyoming at $6.215 a gallon. Colorado is $6.220.
How often are Colorado diesel prices updated?
Every day. This page refreshes each morning from daily state averages, with the EIA weekly survey as a backup.
| Wyoming | $6.215 |
| Montana | $6.313 |
| Utah | $6.564 |
| Idaho | $6.590 |
Source: AAA daily state average, September 22, 2026. All 50 states
Running freight through Colorado?
Texas Solutions dispatches semis for 5%, hotshots for 8% and box trucks for 10% of weekly gross. We plan lanes to cut empty miles and fuel.