🗺️CityToCityDistance

Salt Lake City to Boise Distance

340 miles•547 km•5 hours

Driving distance and route information from Salt Lake City, United Statesto Boise, United States. Compare multiple routes and get detailed travel information.

⭐

FASTEST ROUTE

340.09 mi
(547.33 km)
⏱️5h 2m
Via SR-186 → I-15 → I-84 → US-20
SR-186 → I-15
🔄

ALTERNATIVE ROUTE

424.22 mi
(682.71 km)
⏱️6h 33m
Via I-80 → US-93 → I-84 → US-20
I-80 → US-93
📏 Straight-line distance: 296 miles (477 km)
See crow flies distance →
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Complete Driving Guide: Salt Lake City to Boise

Essential Route Information

TOTAL DISTANCE
340 mi
547 kilometers
DRIVING TIME
5 hours
300 minutes
FUEL ESTIMATE
46 L
$68 cost

📍 Route Overview

Starting PointSalt Lake City, Utah
DestinationBoise, Idaho
Route Options2 available routes
Countries Crossed1 country
Time Zone ChangesCheck local times

🚗 Driving Details

Average Speed109 km/h
Straight-line Distance477 km
Route Efficiency87%
Toll RoadsNo tolls expected
Ferry CrossingsNo ferries

Compare All Routes from Salt Lake City to Boise

Route TypeDistanceDrive TimeAvg SpeedTolls
⭐ Fastest Route340 mi (547 km)5 hours109 km/h❌ No
Alternative 1424 mi (683 km)6.6 hours104 km/h❌ No

Complete Journey Overview: Salt Lake City to Boise

The road journey from Salt Lake City to Boise spans approximately 340 miles (547 kilometers), making it a long-distance drive that typically requires 5 hours of continuous driving under normal traffic conditions.

This route connects Utah, United States with Idaho, United States, traversing through various regions within United States. The journey offers 2 distinct routing options, each with unique advantages in terms of distance, time, or scenic value.

The fastest driving route from Salt Lake City to Boise follows the SR-186 → I-15 → I-84 → US-20 corridor, maintaining an average speed of approximately 109 km/h. This corridor avoids toll roads, keeping out-of-pocket cost limited to fuel and incidentals.

🗺️ Travel Planning Essentials

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Fuel Planning: Expect to use approximately 14 gallons (46 liters) of fuel for this 340 mile journey. Plan fuel stops every 250-300 miles.
✓
Rest Stops: For safety, plan a 15-minute break every 2 hours of driving. Total journey with breaks: 5.8 hours.
✓
Best Travel Times: Avoid peak traffic hours (7-9 AM and 5-7 PM) in major cities along your route for optimal travel time.
✓
Weather Check: Monitor weather conditions along the entire route, especially during winter months or rainy seasons.

💰 Cost Estimation Guide

Fuel Cost (approximate)$48
Toll Costs$0
Vehicle Wear & Tear (total, ~$0.25/mi)$85
Total Trip Cost$133

* Costs are estimates based on average fuel prices and vehicle maintenance. Actual costs may vary.

Alternative Transportation Options

🚗

By Car

5 hours

340 miles

✈️

By Plane

0.6 hours flight

477 km direct

🚌

By Bus

6.5 hours

Multiple stops

More routes from Salt Lake City

View all distances from Salt Lake City →

More routes from Boise

View all distances from Boise →

Salt Lake City to Boise - Frequently Asked Questions

What is the driving distance from Salt Lake City to Boise?
The driving distance from Salt Lake City to Boise is 340 miles (547 km) by the fastest route, which follows SR-186 → I-15 → I-84 → US-20. The straight-line ("as the crow flies") distance is 477 km — driving distances are typically 20-40% longer than straight-line because roads must navigate around terrain and built environment.
How long does it take to drive from Salt Lake City to Boise?
The drive from Salt Lake City to Boise takes approximately 5h 2m of continuous driving at an average speed of 109 km/h. With a 15-minute rest stop every two hours, plan on roughly 5.8 hours of total trip time. Add additional time for traffic, weather, or border crossings.
What is the fastest route from Salt Lake City to Boise?
The fastest driving route from Salt Lake City to Boise is 340 miles (547 km) via SR-186 → I-15 → I-84 → US-20, taking about 5h 2m. This corridor follows the major highway connection between the two cities and is optimized for travel time.
Are there alternative routes from Salt Lake City to Boise?
Yes, 2 routing options exist between Salt Lake City and Boise. Alternatives have similar total distance but use different road segments — useful if the primary corridor has heavy traffic or construction.
Does the route from Salt Lake City to Boise include tolls?
No, the fastest driving route from Salt Lake City to Boise stays on toll-free public roads. Alternative routes may use different segments — check each route's summary above.
How much fuel does it take to drive from Salt Lake City to Boise?
A standard car at 30 mpg uses approximately 11 gallons (46 liters) of fuel for the 340-mile (547-km) drive from Salt Lake City to Boise. At $3.50 per gallon that is roughly $39 in fuel cost; less efficient vehicles or higher local fuel prices will increase this proportionally.
How do I navigate from Salt Lake City to Boise?
Use the "Open this route in your nav app" buttons above the journey guide to launch turn-by-turn directions in Google Maps, Apple Maps, or Waze. Each link pre-fills Salt Lake City as the origin and Boise as the destination, so navigation begins as soon as the app opens.