How far is Post Falls, ID from Ashton, ID?
The driving distance from Post Falls, ID to Ashton, ID is about 466.8 miles (751.2 km), with a travel time of about 08h 20m by car.
- The straight-line flight distance is about 365.2 miles (587.8 km).
- For a round trip, plan for roughly 16h 41m 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 08h 20m.
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 Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Post Falls and Ashton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Post Falls and Ashton.
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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
288.7 mi · 4 hr 51 min
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5
Keep slight right
33.9 mi · 35 min
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6
Take the exit slight right toward MT 359: Cardwell, Boulder
1555 ft · 39 sec
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7
Turn right
46 m · 3 sec
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8
Continue straight
14.6 mi · 18 min
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9
At the end of the road, turn right
28 mi · 33 min
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10
At the end of the road, turn left
40.4 mi · 45 min
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11
Turn right
8.6 mi · 13 min
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12
Continue straight
9.1 mi · 12 min
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13
At the end of the road, turn right onto Idaho Medal of Honor Highway
41.7 mi · 51 min · Idaho Medal of Honor Highway
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14
Turn left onto Main Street
2026 ft · 40 sec · Main Street
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15
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Post Falls and Ashton.
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
289 mi · 04h 51m
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 Chance Snow Showers near Ashton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Post Falls to Ashton?
The road trip is about 466.8 miles (751.2 km) and usually takes 08h 20m 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 233.1 miles from Post Falls and 233.7 miles from Ashton.
How much longer is the road route than the straight-line distance?
The direct path is about 365.2 miles (587.8 km), while the road route adds roughly 101.6 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 $64.12 one way or $128.24 round trip. Estimated CO2 is about 146.4 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 Ashton, 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 Chance Snow Showers near Ashton.
Flight Path Map
This map shows the direct air route between Post Falls and Ashton. Straight-line distance: 365.22 mi (587.76 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 Ashton
City in Fremont County, Idaho, United States
| Population | 1,050 |
| Coordinates | 44.0715800, -111.4482900 |
| Altitude | 1603 |
| Country | United States |
End: Ashton (-111.44829, 44.07158)
Estimated Travel Time
Distance: 751 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 15h 33m |
| 40 mph (64.37 km/h) | 11h 40m |
| 50 mph (80.47 km/h) | 09h 20m |
| 60 mph (96.56 km/h) | 07h 46m |
| 70 mph (112.65 km/h) | 06h 40m |
| 80 mph (129 km/h) | 05h 49m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $64.12 | $128.24 |
| Mid-grade | $4.23 | $69.68 | $139.37 |
| Premium | $4.55 | $74.92 | $149.84 |
| Diesel | $5.41 | $89.14 | $178.27 |
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.