via I-5
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 is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
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.
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.
✈️ 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.
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
The moderate drive from Boise to Missoula follows I-5 for 390 miles, with an estimated travel time of 5h 30min under normal conditions. Fuel costs run approximately $45 at current prices, assuming average fuel efficiency of 30 MPG. Early morning (6-8 am) is generally the best window to depart for the smoothest ride.
Covering 390 miles, this is a solid half-day drive. Pack some snacks and a good playlist — you'll want to stay comfortable for the journey. A single fuel stop should be sufficient for most vehicles.