How far is Boise, ID from Sun Valley, ID?
The driving distance from Boise, ID to Sun Valley, ID is about 155 miles (249.4 km), with a travel time of about 03h 06m by car.
- The straight-line flight distance is about 92.8 miles (149.3 km).
- For a round trip, plan for roughly 06h 13m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 03h 06m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Camas County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Boise and Sun Valley.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boise and Sun Valley.
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1
Start on the route
36 m · 11 sec
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2
Turn right
80 m · 21 sec
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3
Turn right onto South 6th Street
849 ft · 39 sec · South 6th Street
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4
Turn left onto West Myrtle Street
1 km · 1 min · West Myrtle Street
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5
Turn right onto South Broadway Avenue
2.8 mi · 6 min · South Broadway Avenue
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6
Take the ramp left toward I 84 East
2049 ft · 46 sec · Idaho Medal of Honor Highway
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7
Continue on Vietnam Veterans Memorial Highway
40 mi · 38 min · Vietnam Veterans Memorial Highway
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8
Take the exit slight right toward US 20, I 84 Business: Mountain Home, Fairfield
1894 ft · 55 sec · Idaho Medal of Honor Highway
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9
Continue on Idaho Medal of Honor Highway
618 ft · 10 sec · Idaho Medal of Honor Highway
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10
Continue on Sun Valley Highway
40.8 mi · 47 min · Sun Valley Highway
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11
Continue on Idaho Medal of Honor Highway
41.7 mi · 48 min · Idaho Medal of Honor Highway
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12
Turn left
26.2 mi · 39 min
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13
Turn right onto East Sun Valley Road
1.5 mi · 4 min · East Sun Valley Road
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14
Turn right onto Moritz Road
851 ft · 37 sec · Moritz Road
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15
Turn right onto Inn Entry Lane
88 m · 13 sec · Inn Entry Lane
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16
Arrive at your destination
0 m · 1 sec · Inn Entry Lane
Car Route Details
A richer read on the saved driving route between Boise and Sun Valley.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Idaho Medal of Honor Highway
Continue on Idaho Medal of Honor Highway
41.7 mi · 00h 48m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Boise and Mostly Sunny then Slight Chance Snow Showers near Sun Valley.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Boise to Sun Valley?
The road trip is about 155 miles (249.4 km) and usually takes 03h 06m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Fairfield is a useful midpoint, sitting about 77.4 miles from Boise and 77.5 miles from Sun Valley.
How much longer is the road route than the straight-line distance?
The direct path is about 92.8 miles (149.3 km), while the road route adds roughly 62.2 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 10:46 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.29 one way or $42.59 round trip. Estimated CO2 is about 48.6 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Boise and Mostly Sunny then Slight Chance Snow Showers near Sun Valley.
Stop Ideas Near Fairfield
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Fairfield.
Twin Falls, Idaho
Boise, Idaho
Flight Path Map
This map shows the direct air route between Boise and Sun Valley. Straight-line distance: 92.75 mi (149.26 km).
#1 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| Country | United States |
#2 Sun Valley
Resort city in Blaine County, Idaho, United States
| Population | 1,486 |
| Coordinates | 43.6971300, -114.3517200 |
| Altitude | 1812 |
| Country | United States |
End: Sun Valley (-114.35172, 43.69713)
Estimated Travel Time
Distance: 249 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 09m |
| 40 mph (64.37 km/h) | 03h 52m |
| 50 mph (80.47 km/h) | 03h 05m |
| 60 mph (96.56 km/h) | 02h 34m |
| 70 mph (112.65 km/h) | 02h 12m |
| 80 mph (129 km/h) | 01h 55m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $21.29 | $42.59 |
| Mid-grade | $4.23 | $23.14 | $46.29 |
| Premium | $4.55 | $24.88 | $49.77 |
| Diesel | $5.41 | $29.60 | $59.21 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Idaho · Apr 17, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.