Diesel Prices in Delaware Today
Average diesel price in Delaware: $6.427 per gallon on September 22, 2026. U.S. average $6.529. Updated daily.
What is the price of diesel in Delaware today?
Diesel in Delaware averages $6.427 per gallon today (September 22, 2026), $0.102 less than the U.S. average of $6.529. Delaware ranks #28 of 51 for cheapest diesel (1 = cheapest). A loaded semi at about 6.3 mpg spends about $1.02 per mile on fuel in Delaware.
per gallon today
U.S. average $6.529
of 51 (1 = cheapest)
semi truck, today
Fuel cost per mile in Delaware
Estimated diesel cost at today's Delaware price of $6.427 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 | $1.02 | $1,022 |
| Reefer38,000 lbs, ~6.0 mpg | $1.06 | $1,064 |
| Flatbed40,000 lbs, ~6.0 mpg | $1.06 | $1,063 |
| Hotshot12,000 lbs, ~8.9 mpg | $0.72 | $722 |
| Box Truck7,000 lbs, ~9.1 mpg | $0.70 | $705 |
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 Delaware today?
Diesel in Delaware averages $6.427 per gallon today (September 22, 2026), $0.102 less than the U.S. average of $6.529. Delaware ranks #28 of 51 for cheapest diesel (1 = cheapest). A loaded semi at about 6.3 mpg spends about $1.02 per mile on fuel in Delaware.
How much does it cost to fill a semi truck in Delaware?
At $6.43 a gallon, 150 gallons of diesel costs about $964 and 200 gallons about $1,285 in Delaware today.
Is diesel cheaper in Delaware than nearby states?
Among nearby states in the same region, the cheapest today is New Jersey at $6.465 a gallon. Delaware is $6.427.
How often are Delaware diesel prices updated?
Every day. This page refreshes each morning from daily state averages, with the EIA weekly survey as a backup.
| New Jersey | $6.465 |
| Maryland | $6.494 |
| New York | $6.504 |
| District of Columbia | $6.506 |
| Pennsylvania | $6.610 |
Source: AAA daily state average, September 22, 2026. All 50 states
Running freight through Delaware?
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.