The drive from Grand Teton to Boise takes approximately 6h 15min, covering 344 miles via I-90. Under normal conditions, expect to spend around $40 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 8–9+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic Estimate
🟢 Light traffic
5h 19m
🔵 Typical
6h 15min
🔴 Heavy traffic
9h 4m
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
Trip Details
Distance344 miles (553 km)
Drive Time6h 15min
RouteI-90
Best TimeMid-morning (9-11 AM)
Fuel Costs
Gas (30 mpg)~11.5 gallons
Est. Cost$40
Route Tips: I-90
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 Grand Teton to Boise
For a long drive like Grand Teton to Boise, plan to depart early in the morning. This lets you cover most of the distance before afternoon traffic builds up. Consider breaking the trip with a lunch stop midway.
🟢 Best:Mid-morning (9-11 AM)
🔴 Avoid:Rush hour (4-7 PM)
Driving vs Flying
🚗 Driving
6h 15min
~$40 gas
✈️ Flying
3h 11m
~$80–$150 flight
✈️ Flying is faster when you factor in airport time. Flight time is ~41 min but add ~2.5 hours for check-in, security, and boarding.
All Travel Options
🚗 Drive
6h 15min
~$40
🚌 Bus
7h 39m
~$28–$62
🚂 Train
6h 15m
~$41–$103
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
Suggested Stops
Popular cities along the route for rest, food, or fuel:
📍 Sun Valley
Frequently Asked Questions
How long does it take to drive from Grand Teton to Boise?
The drive from Grand Teton to Boise takes approximately 6h 15min covering 344 miles via I-90. Actual time may vary based on traffic, weather, and road conditions.
How much does gas cost for Grand Teton to Boise?
At 30 MPG and $3.50/gallon, expect to spend approximately $40 on gas for this 344-mile trip. You'll need about 11.5 gallons of fuel.
What is the best time to drive from Grand Teton to Boise?
Mid-morning (9-11 AM) to avoid heavy traffic. Weekday mornings before 7 AM or evenings after 7 PM typically have less congestion.
Are there tolls on the Grand Teton to Boise route?
There may be minor tolls (around $10) on parts of this route. Some sections have toll-free alternatives.
