How far is Post Falls, ID from Sun Valley, ID?
The driving distance from Post Falls, ID to Sun Valley, ID is about 445.3 miles (716.7 km), with a travel time of about 09h 46m by car.
- The straight-line flight distance is about 304.8 miles (490.5 km).
- For a round trip, plan for roughly 19h 32m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM PDT.
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 09h 46m.
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.
City in Lemhi County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny then Slight Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Post Falls and Sun Valley.
Turn-by-Turn Driving Directions
Step-by-step road directions between Post Falls and Sun Valley.
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1
Start on West 10th Avenue
872 ft · 40 sec · West 10th Avenue
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2
Turn right onto North Spokane Street
2114 ft · 1 min · North Spokane Street
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3
Turn left
2024 ft · 51 sec
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4
Merge slight left
169.2 mi · 2 hr 57 min
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5
Take the exit slight right toward US 93 South: Hamilton
1236 ft · 27 sec
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6
Turn right onto North Reserve Street
5.3 mi · 9 min · North Reserve Street
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7
Turn right onto Brooks Street
2981 ft · 1 min · Brooks Street
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8
Continue on Bitteroot Road
3 mi · 4 min · Bitteroot Road
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9
Continue on US Highway 93 South
128.1 mi · 2 hr 49 min · US Highway 93 South
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10
Continue on Salmon River Scenic Byway
4.5 mi · 7 min · Salmon River Scenic Byway
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11
Turn left onto Courthouse Drive
149 m · 8 sec · Courthouse Drive
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12
Continue on Main Street
3185 ft · 60 sec · Main Street
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13
Turn right onto South Challis Street
2152 ft · 36 sec · South Challis Street
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14
Continue on Salmon River Scenic Byway
91.8 mi · 1 hr 57 min · Salmon River Scenic Byway
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15
Turn right
1541 ft · 42 sec
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16
Continue on Old Chilly Road
2.7 mi · 7 min · Old Chilly Road
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17
Turn right onto Trail Creek Road
36.3 mi · 1 hr 28 min · Trail Creek Road
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18
Continue on Sun Valley Road
1.4 km · 2 min · Sun Valley Road
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19
Turn left onto Moritz Road
851 ft · 37 sec · Moritz Road
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20
Turn right onto Inn Entry Lane
88 m · 13 sec · Inn Entry Lane
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21
Arrive at your destination
0 m · 1 sec · Inn Entry Lane
Car Route Details
A richer read on the saved driving route between Post Falls and Sun Valley.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
North Spokane Street
Merge slight left
169 mi · 02h 57m
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 leaving Post Falls 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 Post Falls to Sun Valley?
The road trip is about 445.3 miles (716.7 km) and usually takes 09h 46m 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?
Salmon is a useful midpoint, sitting about 222.5 miles from Post Falls and 222.9 miles from Sun Valley.
How much longer is the road route than the straight-line distance?
The direct path is about 304.8 miles (490.5 km), while the road route adds roughly 140.5 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 PDT. 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 $61.16 one way or $122.32 round trip. Estimated CO2 is about 139.6 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Post Falls and Sun Valley, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Post Falls and Mostly Sunny then Slight Chance Snow Showers near Sun Valley.
Flight Path Map
This map shows the direct air route between Post Falls and Sun Valley. Straight-line distance: 304.78 mi (490.49 km).
#1 Post Falls
City in Kootenai County, Idaho, United States
| Population | 36,250 |
| Coordinates | 47.7179600, -116.9515900 |
| Altitude | 665 |
| 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: 717 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 14h 50m |
| 40 mph (64.37 km/h) | 11h 07m |
| 50 mph (80.47 km/h) | 08h 54m |
| 60 mph (96.56 km/h) | 07h 25m |
| 70 mph (112.65 km/h) | 06h 21m |
| 80 mph (129 km/h) | 05h 33m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $61.16 | $122.32 |
| Mid-grade | $4.23 | $66.47 | $132.94 |
| Premium | $4.55 | $71.46 | $142.93 |
| Diesel | $5.41 | $85.02 | $170.05 |
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.