The drive from Boise to Missoula takes approximately 5h 30min, covering 390 miles via I-5. Under normal conditions, expect to spend around $45 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 7–8+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic Estimate
🟢 Light traffic
4h 40m
🔵 Typical
5h 30min
🔴 Heavy traffic
7h 58m
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
Trip Details
Distance390 miles (627 km)
Drive Time5h 30min
RouteI-5
Best TimeEarly morning (6-8 AM)
Fuel Costs
Gas (30 mpg)~13.0 gallons
Est. Cost$45
Route Tips: I-5
Plan rest stops every 2-3 hours on longer drives. Check traffic conditions before departure and keep your tank above quarter-full.
This trip can typically be done on a single tank of gas.
Best Time to Drive from Boise to Missoula
The best time to drive from Boise to Missoula is early morning (6-8 am). Weekday mornings before 7 AM or evenings after 7 PM typically have the lightest traffic. Avoid Friday afternoons and Sunday evenings when possible.
🟢 Best:Early morning (6-8 AM)
🔴 Avoid:Rush hour (4-7 PM)
Driving vs Flying
🚗 Driving
5h 30min
~$45 gas
✈️ Flying
3h 17m
~$80–$150 flight
✈️ Flying is faster when you factor in airport time. Flight time is ~47 min but add ~2.5 hours for check-in, security, and boarding.
All Travel Options
🚗 Drive
5h 30min
~$45
🚌 Bus
8h 40m
~$31–$70
🚂 Train
7h 5m
~$47–$117
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
Frequently Asked Questions
How long does it take to drive from Boise to Missoula?
The drive from Boise to Missoula takes approximately 5h 30min covering 390 miles via I-5. Actual time may vary based on traffic, weather, and road conditions.
How much does gas cost for Boise to Missoula?
At 30 MPG and $3.50/gallon, expect to spend approximately $45 on gas for this 390-mile trip. You'll need about 13.0 gallons of fuel.
What is the best time to drive from Boise to Missoula?
Early morning (6-8 AM) to avoid heavy traffic. Weekday mornings before 7 AM or evenings after 7 PM typically have less congestion.
Are there tolls on the Boise to Missoula route?
Yes, expect approximately $11 in tolls along this route. Check with the local toll authority for transponder options to speed up toll payment.
