Diesel prices along
I-81.
I-81 runs south to north from Knoxville to the Canadian border in New York, crossing 6 states. Right now the cheapest median on the corridor is $6.30/gal in Tennessee and the most expensive is $6.79/gal in Pennsylvania, a $0.49/gal gap.
Data window: last 7 days · 1,653 observations · 817 truck stops on I-81
Where the cheap stops fall
Fuel in Tennessee, state 1 of 6 running south to north.
Running I-81 south to north, Tennessee is where the median drops lowest. A 250-gallon fill there runs about $122 less than the same fill in Pennsylvania, on one truck, on one fill, before any negotiated discount is applied.
State medians tell you which state to lean on. Which station, how many gallons, and whether the tank can make it there is what ValveRide Flow works out per dispatch, with your contract rates and state fuel-tax differences layered on top of the posted price.
State by state
I-81 diesel prices, Tennessee to New York
States in road order, south to north. Cheap and expensive are the 10th and 90th percentile of tracked stations in each state; spread is the gap between them, and a wider spread means more room for a routed fleet to save inside that state.
| # | State | Cheap (p10) | Median | Expensive (p90) | Spread | Stations |
|---|---|---|---|---|---|---|
| 1 | TennesseeTNcheapest median | $5.75 | $6.30 | $6.40 | $0.65 | 182 |
| 2 | VirginiaVA | $6.00 | $6.50 | $6.80 | $0.80 | 197 |
| 3 | West VirginiaWV | $6.09 | $6.50 | $6.60 | $0.51 | 36 |
| 4 | MarylandMD | $6.26 | $6.69 | $6.80 | $0.54 | 69 |
| 5 | PennsylvaniaPA | $6.50 | $6.79 | $7.00 | $0.50 | 219 |
| 6 | New YorkNY | $6.30 | $6.61 | $6.90 | $0.60 | 114 |
Running a load on I-81?
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Questions, answered
I-81 diesel prices, explained.
Where is diesel cheapest along I-81 right now?
The lowest median diesel price on I-81 is $6.30 per gallon in Tennessee, across 182 tracked truck stops. The cheapest 10% of stations anywhere on the corridor are at or below $5.75/gal, in Tennessee.
Which states on I-81 have the most expensive diesel?
Pennsylvania has the highest median on I-81 at $6.79/gal, $0.49 above Tennessee. On a 250-gallon fill that gap is about $122 between the two states, before any negotiated discount.
How much does diesel cost along I-81 today?
State medians along I-81 currently range from $6.30 in Tennessee to $6.79 in Pennsylvania, based on 1,653 price observations from 817 truck stops in the last 7 days. Prices are pump-posted retail, not contract rates.
Prices are pump-posted retail percentiles from tracked truck stops in the 48 contiguous states, never contract or discounted rates. Methodology and the full state table live on the national diesel prices page.
Connecting corridors
Other interstates that share a state with I-81
All corridors: diesel prices by interstate. Origin-to-destination view: diesel prices by lane.
Your trucks run I-81.
Flow makes every fill count.
Live prices, your negotiated contracts, and state fuel-tax math, applied automatically on every dispatch, with every claimed dollar reconciled against a real transaction.