Diesel prices from
Illinois to Missouri.
The most direct path from Illinois to Missouri crosses 2 states. The cheapest median on the lane is $5.89/gal in Missouri; the most expensive is $6.10/gal in Illinois.
Data window: last 7 days · 948 observations · 548 truck stops on the lane
Where to fill
Outbound, fuel in Missouri. Coming back, same state.
Illinois to Missouri: Missouri is state 2 of 2 on the path and carries the lowest median. Missouri back to Illinois: it is state 1 of 2, so the fill lands earlier in the run. Either way, a 250-gallon fill in Missouri runs about $52 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 Missouri 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 | MissouriMOcheapest median | $5.50 | $5.89 | $6.16 | $0.66 | 208 |
The state sequence is the most direct land-border path between Illinois and Missouri 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 Missouri diesel prices, explained.
Where is diesel cheapest between Illinois and Missouri?
Of the 2 states on the most direct Illinois to Missouri path, Missouri has the lowest median diesel price at $5.89 per gallon across 208 tracked truck stops. The cheapest individual stations on the lane are in Missouri, where the cheapest 10% post $5.50 or less.
Is diesel cheaper in Illinois or Missouri?
Missouri is cheaper: median $5.89 versus $6.10 in Illinois, a $0.21/gal difference at the median.
How much can a truck save on the Illinois to Missouri lane?
The median-to-median gap between the cheapest state on the lane (Missouri, $5.89) and the most expensive (Illinois, $6.10) is $0.21 per gallon. On a 250-gallon fill that is about $52 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 Missouri
All 42 lanes: diesel prices by lane. Interstate view: diesel prices by corridor.
You run Illinois to Missouri.
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.