Diesel prices from
Texas to Illinois.
The most direct path from Texas to Illinois crosses 4 states (Oklahoma, Missouri in between). The cheapest median on the lane is $5.60/gal in Oklahoma; the most expensive is $6.10/gal in Illinois.
Data window: last 7 days · 3,087 observations · 1,954 truck stops on the lane
Where to fill
Outbound, fuel in Oklahoma. Coming back, same state.
Texas to Illinois: Oklahoma is state 2 of 4 on the path and carries the lowest median. Illinois back to Texas: it is state 3 of 4, so the fill lands later in the run. Either way, a 250-gallon fill in Oklahoma runs about $125 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 Texas to Illinois path
States in order from Texas. 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 | TexasTX | $5.40 | $5.70 | $6.10 | $0.70 | 1,210 |
| 2 | OklahomaOKcheapest median | $5.30 | $5.60 | $5.90 | $0.60 | 196 |
| 3 | MissouriMO | $5.50 | $5.89 | $6.16 | $0.66 | 208 |
| 4 | IllinoisIL | $5.80 | $6.10 | $6.30 | $0.50 | 340 |
The state sequence is the most direct land-border path between Texas and Illinois by geography, not a routed itinerary; a dispatched route can clip a neighboring state this list skips.
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Questions, answered
Texas to Illinois diesel prices, explained.
Where is diesel cheapest between Texas and Illinois?
Of the 4 states on the most direct Texas to Illinois path, Oklahoma has the lowest median diesel price at $5.60 per gallon across 196 tracked truck stops. The cheapest individual stations on the lane are in Oklahoma, where the cheapest 10% post $5.30 or less.
Is diesel cheaper in Texas or Illinois?
Texas is cheaper: median $5.70 versus $6.10 in Illinois, a $0.40/gal difference at the median.
How much can a truck save on the Texas to Illinois lane?
The median-to-median gap between the cheapest state on the lane (Oklahoma, $5.60) and the most expensive (Illinois, $6.10) is $0.50 per gallon. On a 250-gallon fill that is about $125 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 Texas and Illinois
All 42 lanes: diesel prices by lane. Interstate view: diesel prices by corridor.
You run Texas to Illinois.
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.