How far is Sun Valley, ID from Lewiston, ID?
The driving distance from Sun Valley, ID to Lewiston, ID is about 378.5 miles (609.2 km), with a travel time of about 07h 19m by car.
- The straight-line flight distance is about 228.5 miles (367.8 km).
- For a round trip, plan for roughly 14h 38m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 07h 19m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Rural city in and the county seat of Valley 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 Sun Valley and Lewiston.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sun Valley and Lewiston.
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1
Start on Inn Entry Lane
88 m · 13 sec · Inn Entry Lane
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2
Turn left onto Moritz Road
851 ft · 42 sec · Moritz Road
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3
At the end of the road, turn left onto Sun Valley Road
2677 ft · 1 min · Sun Valley Road
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4
Turn right onto Saddle Road
2904 ft · 1 min · Saddle Road
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5
Turn right onto State Highway 75
60.1 mi · 1 hr 29 min · State Highway 75
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6
Turn left onto Eva Falls Avenue
1 mi · 2 min · Eva Falls Avenue
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7
Continue on State Highway 21
24.4 mi · 28 min · State Highway 21
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8
Continue on Ponderosa Pine Scenic Route
32.8 mi · 45 min · Ponderosa Pine Scenic Route
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9
Turn right onto Banks Lowman Road
33.3 mi · 59 min · Banks Lowman Road
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10
Turn right onto Horseshoe Bend Road
18.4 mi · 25 min · Horseshoe Bend Road
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11
Continue on Main Street
45.6 mi · 1 hr 2 min · Main Street
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12
Turn left onto Deinhard Lane
1.6 mi · 3 min · Deinhard Lane
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13
Continue on Boydstun Street
1.5 km · 2 min · Boydstun Street
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14
At the end of the road, turn left onto West Lake Street
10.6 mi · 16 min · West Lake Street
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15
Turn right onto North Norris Avenue
76.4 mi · 1 hr 27 min · North Norris Avenue
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16
Turn left onto Johnston Road
2.2 mi · 5 min · Johnston Road
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17
At the end of the road, turn left
67.5 mi · 1 hr 19 min
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18
Keep slight left to continue on Lewiston
1.6 mi · 3 min
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19
Turn right onto Idaho Street
1.2 km · 2 min · Idaho Street
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20
Turn left
32 m · 8 sec
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21
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Sun Valley and Lewiston.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
North Norris Avenue
Turn right onto North Norris Avenue
76.4 mi · 01h 27m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny then Slight Chance Snow Showers leaving Sun Valley and Sunny near Lewiston.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sun Valley to Lewiston?
The road trip is about 378.5 miles (609.2 km) and usually takes 07h 19m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Cascade is a useful midpoint, sitting about 189.1 miles from Sun Valley and 189.5 miles from Lewiston.
How much longer is the road route than the straight-line distance?
The direct path is about 228.5 miles (367.8 km), while the road route adds roughly 150 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 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $52.01 one way or $104.02 round trip. Estimated CO2 is about 118.7 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Sun Valley and Lewiston, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Snow Showers around Sun Valley and Sunny near Lewiston.
Stop Ideas Near Cascade
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 Cascade.
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Flight Path Map
This map shows the direct air route between Sun Valley and Lewiston. Straight-line distance: 228.52 mi (367.76 km).
#1 Sun Valley
Resort city in Blaine County, Idaho, United States
| Population | 1,486 |
| Coordinates | 43.6971300, -114.3517200 |
| Altitude | 1812 |
| Country | United States |
#2 Lewiston
City in Nez Perce County, Idaho, USA
| Population | 32,788 |
| Coordinates | 46.4165500, -117.0176600 |
| Altitude | 227 |
| Country | United States |
End: Idaho Street (-117.0175, 46.416816)
Estimated Travel Time
Distance: 609 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 36m |
| 40 mph (64.37 km/h) | 09h 27m |
| 50 mph (80.47 km/h) | 07h 34m |
| 60 mph (96.56 km/h) | 06h 18m |
| 70 mph (112.65 km/h) | 05h 24m |
| 80 mph (129 km/h) | 04h 43m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $52.01 | $104.02 |
| Mid-grade | $4.23 | $56.53 | $113.05 |
| Premium | $4.55 | $60.77 | $121.55 |
| Diesel | $5.41 | $72.30 | $144.61 |
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.