How far is Sun Valley, ID from Post Falls, ID?
The driving distance from Sun Valley, ID to Post Falls, ID is about 445 miles (716.2 km), with a travel time of about 08h 33m by car.
- The straight-line flight distance is about 304.8 miles (490.5 km).
- For a round trip, plan for roughly 17h 06m 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 08h 33m.
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 then Slight Chance Snow Showers
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Sun Valley and Post Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sun Valley and Post Falls.
-
1
Start on Inn Entry Lane
88 m · 13 sec · Inn Entry Lane
-
2
Turn left onto Moritz Road
851 ft · 40 sec · Moritz Road
-
3
At the end of the road, turn right onto Sun Valley Road
1.4 km · 2 min · Sun Valley Road
-
4
Continue on Trail Creek Road
36.3 mi · 1 hr 28 min · Trail Creek Road
-
5
Turn left onto Old Chilly Road
2.7 mi · 7 min · Old Chilly Road
-
6
Continue straight
1541 ft · 48 sec
-
7
Turn left
92.2 mi · 1 hr 57 min
-
8
Turn left onto Main Street
1.1 km · 1 min · Main Street
-
9
Turn slight right onto US 93: Missoula
135.6 mi · 2 hr 59 min
-
10
Continue on Brooks Street
2981 ft · 1 min · Brooks Street
-
11
Turn left onto South Reserve Street
5.4 mi · 9 min · South Reserve Street
-
12
Turn left onto I 90 West, US 93 North, MT 200 West: Kalispell, Coeur D' Alene
1726 ft · 44 sec
-
13
Merge slight left onto Jeannette Rankin Memorial Highway
169.2 mi · 2 hr 58 min · Jeannette Rankin Memorial Highway
-
14
Take the exit slight right toward Spokane Street
1913 ft · 50 sec
-
15
Turn right onto North Spokane Street
1710 ft · 1 min · North Spokane Street
-
16
Turn left onto West 10th Avenue
872 ft · 38 sec · West 10th Avenue
-
17
Arrive at your destination
0 m · 1 sec · West 10th Avenue
Car Route Details
A richer read on the saved driving route between Sun Valley and Post Falls.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Jeannette Rankin Memorial Highway
Merge slight left onto Jeannette Rankin Memorial Highway
169 mi · 02h 58m
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 Mostly Sunny near Post Falls.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sun Valley to Post Falls?
The road trip is about 445 miles (716.2 km) and usually takes 08h 33m 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 Sun Valley and 222.6 miles from Post Falls.
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 140.2 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 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 $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 Sun Valley and Post Falls, 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 Mostly Sunny near Post Falls.
Flight Path Map
This map shows the direct air route between Sun Valley and Post Falls. Straight-line distance: 304.78 mi (490.49 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 Post Falls
City in Kootenai County, Idaho, United States
| Population | 36,250 |
| Coordinates | 47.7179600, -116.9515900 |
| Altitude | 665 |
| Country | United States |
End: West 10th Avenue (-116.951612, 47.717931)
Estimated Travel Time
Distance: 716 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 14h 49m |
| 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.