Cost to drive from Salt Lake City to Boise
Driving from Salt Lake City to Boise covers 341 miles (548 km) and takes about 5h 35min without stops. At Utah's current fuel prices (week of 2026-07-20), the fuel for the trip costs about $47.35 in a typical petrol car — here's the full breakdown for petrol, diesel and electric.
| Location | Petrol/gal | Diesel/gal |
|---|---|---|
| Salt Lake City | $4.17 | $5.11 |
| Boise | $4.23 | $5.11 |
Enter your fuel economy and see stops along the way.
How this cost is calculated
We take the real driving distance between Salt Lake City and Boise (341 miles) from OpenStreetMap routing, then multiply by a typical car's fuel use and Utah's current average pump price. The petrol figure assumes 30 MPG · 7.8 L/100km; diesel and EV use 35 MPG · 6.7 L/100km and 3.5 mi/kWh. Your real cost depends on your car, traffic, driving style and the stations you pick — use the planner for your exact numbers, and check live prices on the Utah fuel prices page.
Related routes
Frequently asked questions
How much does it cost to drive from Salt Lake City to Boise?
The drive is 341 miles (548 km) and takes about 5h 35min without stops. Fuel costs roughly $47.35 in an average petrol car, $49.70 in a diesel, and $16.54 in an electric car, using Utah's current fuel prices.
How far is it from Salt Lake City to Boise in miles and km?
About 341 miles or 548 kilometres by road — roughly 5h 35min of driving.
Is it cheaper to fill up in Salt Lake City or Boise?
Petrol is cheaper in Utah ($4.17/gal) than in Idaho ($4.23/gal), so fill up before you leave.
How do I get the exact cost for my car?
Open the FuelWide route planner, enter your car's fuel economy, and it prices the trip on live data — and shows fuel or charging stops along the way.
Driving distance via OSRM / OpenStreetMap. Fuel prices are Utah's current official averages; efficiency and electricity rate are typical estimates. Your figure will vary — use the planner for an exact result.