How far is Fremont County, ID from Post Falls, ID?
The driving distance from Fremont County, ID to Post Falls, ID is about 461.6 miles (742.8 km), with a travel time of about 07h 30m by car.
- The straight-line flight distance is about 356.4 miles (573.5 km).
- For a round trip, plan for roughly 15h 00m 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 30m.
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.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Fremont County and Post Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fremont County and Post Falls.
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1
Start on South Antelope Flat Road
4.3 mi · 17 min · South Antelope Flat Road
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2
At the end of the road, turn left onto Idaho Medal of Honor Highway
32.5 mi · 40 min · Idaho Medal of Honor Highway
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3
Turn left
9.1 mi · 12 min
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4
Continue straight
8.6 mi · 13 min
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5
At the end of the road, turn left
40.3 mi · 45 min
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6
Turn straight
137 m · 15 sec
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7
Continue straight
28 mi · 33 min
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8
Turn left
14.6 mi · 18 min
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9
Continue straight
638 ft · 17 sec
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10
Take the ramp left
1776 ft · 43 sec
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11
Merge slight left
36.6 mi · 38 min
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12
Keep slight left to continue on I 90 West: Missoula
286.2 mi · 4 hr 50 min
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13
Take the exit slight right toward Spokane Street
1913 ft · 50 sec
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14
Turn right onto North Spokane Street
1710 ft · 1 min · North Spokane Street
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15
Turn left onto West 10th Avenue
872 ft · 38 sec · West 10th Avenue
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16
Arrive at your destination
0 m · 1 sec · West 10th Avenue
Car Route Details
A richer read on the saved driving route between Fremont County and Post Falls.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 90 West
Keep slight left to continue on I 90 West: Missoula
286 mi · 04h 50m
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.
Sunny leaving Fremont County 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 Fremont County to Post Falls?
The road trip is about 461.6 miles (742.8 km) and usually takes 07h 30m 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 230.5 miles from Fremont County and 231 miles from Post Falls.
How much longer is the road route than the straight-line distance?
The direct path is about 356.4 miles (573.5 km), while the road route adds roughly 105.2 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 $63.42 one way or $126.83 round trip. Estimated CO2 is about 144.8 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Fremont County and Post Falls, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Sunny around Fremont County and Mostly Sunny near Post Falls.
Flight Path Map
This map shows the direct air route between Fremont County and Post Falls. Straight-line distance: 356.35 mi (573.49 km).
#1 Fremont County
County in Idaho, United States
| Population | 13,099 |
| Coordinates | 44.2287900, -111.4820200 |
| Altitude | 1892 |
| 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: 743 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 15h 22m |
| 40 mph (64.37 km/h) | 11h 32m |
| 50 mph (80.47 km/h) | 09h 13m |
| 60 mph (96.56 km/h) | 07h 41m |
| 70 mph (112.65 km/h) | 06h 35m |
| 80 mph (129 km/h) | 05h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $63.42 | $126.83 |
| Mid-grade | $4.23 | $68.92 | $137.85 |
| Premium | $4.55 | $74.10 | $148.21 |
| Diesel | $5.41 | $88.16 | $176.32 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.