How far is Ashton, ID from Lewiston, ID?
The driving distance from Ashton, ID to Lewiston, ID is about 510.1 miles (821 km), with a travel time of about 09h 07m by car.
- The straight-line flight distance is about 315.6 miles (507.9 km).
- For a round trip, plan for roughly 18h 14m 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 09h 07m.
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
Driving Route Map
The map below follows the saved road route between Ashton and Lewiston.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ashton and Lewiston.
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1
Start on Main Street
1652 ft · 33 sec · Main Street
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2
Take the ramp slight right
159 m · 14 sec
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3
Merge slight left onto Idaho Medal of Honor Highway
41.6 mi · 51 min · Idaho Medal of Honor Highway
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4
Turn left
9.1 mi · 12 min
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5
Continue straight
8.6 mi · 13 min
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6
At the end of the road, turn left
40.3 mi · 45 min
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7
Turn straight
137 m · 15 sec
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8
Continue straight
28 mi · 33 min
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9
Turn left
14.6 mi · 18 min
-
10
Continue straight
638 ft · 17 sec
-
11
Take the ramp left
1776 ft · 43 sec
-
12
Merge slight left
36.6 mi · 38 min
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13
Keep slight left to continue on I 90 West: Missoula
112.5 mi · 1 hr 47 min
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14
Take the exit slight right toward US 12 West, I 90 Business
1037 ft · 26 sec
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15
Enter the roundabout and take exit 3 toward Van Buren Street
63 m · 3 sec · Van Buren Street
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16
Exit the roundabout onto Van Buren Street
65 m · 4 sec · Van Buren Street
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17
Enter the roundabout and take exit 1 toward Van Buren Street
28 m · 1 sec · Van Buren Street
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18
Exit the roundabout onto Van Buren Street
583 ft · 11 sec · Van Buren Street
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19
Turn right onto East Broadway Street
1143 ft · 23 sec · East Broadway Street
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20
Turn left onto Madison Street
1419 ft · 18 sec · Madison Street
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21
Continue on Arthur Avenue
543 ft · 9 sec · Arthur Avenue
-
22
Turn right onto South 5th Street East
2052 ft · 36 sec · South 5th Street East
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23
Turn left onto South Higgins Avenue
716 ft · 28 sec · South Higgins Avenue
-
24
Turn right onto Brooks Street
3.3 mi · 5 min · Brooks Street
-
25
Continue on Bitteroot Road
3 mi · 4 min · Bitteroot Road
-
26
Continue on US Highway 93 South
4 mi · 6 min · US Highway 93 South
-
27
Turn right onto Lolo Creek Road
32.6 mi · 39 min · Lolo Creek Road
-
28
Continue straight
163.6 mi · 3 hr 42 min
-
29
Take the exit slight right
7.5 mi · 9 min
-
30
Keep slight left to continue on Lewiston
1.6 mi · 3 min
-
31
Turn right onto Idaho Street
1.2 km · 2 min · Idaho Street
-
32
Turn left
32 m · 8 sec
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33
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Ashton and Lewiston.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Lolo Creek Road
Continue straight
164 mi · 03h 42m
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 Ashton and Sunny near Lewiston.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ashton to Lewiston?
The road trip is about 510.1 miles (821 km) and usually takes 09h 07m 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 254.8 miles from Ashton and 255.3 miles from Lewiston.
How much longer is the road route than the straight-line distance?
The direct path is about 315.6 miles (507.9 km), while the road route adds roughly 194.5 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 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 $70.07 one way or $140.15 round trip. Estimated CO2 is about 160 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Ashton and Lewiston, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Sunny around Ashton and Sunny near Lewiston.
Flight Path Map
This map shows the direct air route between Ashton and Lewiston. Straight-line distance: 315.58 mi (507.87 km).
#1 Ashton
City in Fremont County, Idaho, United States
| Population | 1,050 |
| Coordinates | 44.0715800, -111.4482900 |
| Altitude | 1603 |
| 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: 821 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 16h 59m |
| 40 mph (64.37 km/h) | 12h 45m |
| 50 mph (80.47 km/h) | 10h 12m |
| 60 mph (96.56 km/h) | 08h 30m |
| 70 mph (112.65 km/h) | 07h 17m |
| 80 mph (129 km/h) | 06h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $70.07 | $140.15 |
| Mid-grade | $4.23 | $76.16 | $152.32 |
| Premium | $4.55 | $81.88 | $163.76 |
| Diesel | $5.41 | $97.42 | $194.83 |
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 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.