Diesel prices from
Illinois to Wisconsin.
The most direct path from Illinois to Wisconsin crosses 2 states. The cheapest median on the lane is $5.80/gal in Wisconsin; the most expensive is $6.10/gal in Illinois.
Data window: last 7 days · 960 observations · 637 truck stops on the lane
Where to fill
Outbound, fuel in Wisconsin. Coming back, same state.
Illinois to Wisconsin: Wisconsin is state 2 of 2 on the path and carries the lowest median. Wisconsin back to Illinois: it is state 1 of 2, so the fill lands earlier in the run. Either way, a 250-gallon fill in Wisconsin runs about $75 less than the same fill in Illinois.
The state tells you where the price is; it does not tell you which exit, how many gallons the tank needs to reach it, or whether the IFTA math flips the answer. That is the per-dispatch work ValveRide Flow does automatically, with your contract rates on top of the posted price.
State by state
Every state on the Illinois to Wisconsin path
States in order from Illinois. Cheap and expensive are the 10th and 90th percentile of tracked stations in each state; spread is the gap between them.
| # | State | Cheap (p10) | Median | Expensive (p90) | Spread | Stations |
|---|---|---|---|---|---|---|
| 1 | IllinoisIL | $5.80 | $6.10 | $6.30 | $0.50 | 340 |
| 2 | WisconsinWIcheapest median | $5.60 | $5.80 | $6.00 | $0.40 | 297 |
The state sequence is the most direct land-border path between Illinois and Wisconsin by geography, not a routed itinerary; a dispatched route can clip a neighboring state this list skips.
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Questions, answered
Illinois to Wisconsin diesel prices, explained.
Where is diesel cheapest between Illinois and Wisconsin?
Of the 2 states on the most direct Illinois to Wisconsin path, Wisconsin has the lowest median diesel price at $5.80 per gallon across 297 tracked truck stops. The cheapest individual stations on the lane are in Wisconsin, where the cheapest 10% post $5.60 or less.
Is diesel cheaper in Illinois or Wisconsin?
Wisconsin is cheaper: median $5.80 versus $6.10 in Illinois, a $0.30/gal difference at the median.
How much can a truck save on the Illinois to Wisconsin lane?
The median-to-median gap between the cheapest state on the lane (Wisconsin, $5.80) and the most expensive (Illinois, $6.10) is $0.30 per gallon. On a 250-gallon fill that is about $75 on one truck, before contract discounts and IFTA tax positioning, which is what ValveRide Flow layers on automatically for fleets.
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.
Related lanes
Other lanes out of Illinois and Wisconsin
All 42 lanes: diesel prices by lane. Interstate view: diesel prices by corridor.
You run Illinois to Wisconsin.
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.