Diesel prices from
Washington to Texas.
The most direct path from Washington to Texas crosses 6 states (Idaho, Wyoming, Colorado, New Mexico in between). The cheapest median on the lane is $5.70/gal in Texas; the most expensive is $7.00/gal in Washington.
Data window: last 7 days · 2,553 observations · 1,616 truck stops on the lane
Where to fill
Outbound, fuel in Texas. Coming back, same state.
Washington to Texas: Texas is state 6 of 6 on the path and carries the lowest median. Texas back to Washington: it is state 1 of 6, so the fill lands earlier in the run. Either way, a 250-gallon fill in Texas runs about $325 less than the same fill in Washington.
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 Washington to Texas path
States in order from Washington. 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 | WashingtonWA | $6.55 | $7.00 | $7.30 | $0.74 | 57 |
| 2 | IdahoID | $5.60 | $6.16 | $6.26 | $0.66 | 63 |
| 3 | WyomingWY | $5.40 | $5.96 | $6.09 | $0.69 | 64 |
| 4 | ColoradoCO | $5.30 | $5.76 | $6.00 | $0.70 | 96 |
| 5 | New MexicoNM | $5.60 | $5.99 | $6.20 | $0.60 | 126 |
| 6 | TexasTXcheapest median | $5.40 | $5.70 | $6.10 | $0.70 | 1,210 |
The state sequence is the most direct land-border path between Washington and Texas by geography, not a routed itinerary; a dispatched route can clip a neighboring state this list skips.
Running Washington to Texas this week?
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Questions, answered
Washington to Texas diesel prices, explained.
Where is diesel cheapest between Washington and Texas?
Of the 6 states on the most direct Washington to Texas path, Texas has the lowest median diesel price at $5.70 per gallon across 1,210 tracked truck stops. The cheapest individual stations on the lane are in Colorado, where the cheapest 10% post $5.30 or less.
Is diesel cheaper in Washington or Texas?
Texas is cheaper: median $5.70 versus $7.00 in Washington, a $1.30/gal difference at the median.
How much can a truck save on the Washington to Texas lane?
The median-to-median gap between the cheapest state on the lane (Texas, $5.70) and the most expensive (Washington, $7.00) is $1.30 per gallon. On a 250-gallon fill that is about $325 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 Washington and Texas
All 42 lanes: diesel prices by lane. Interstate view: diesel prices by corridor.
You run Washington to Texas.
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.