How far is Lewiston, ID from Ashton, ID?
The driving distance from Lewiston, ID to Ashton, ID is about 510 miles (820.7 km), with a travel time of about 10h 08m by car.
- The straight-line flight distance is about 315.6 miles (507.9 km).
- For a round trip, plan for roughly 20h 16m 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 10h 08m.
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.
Light Rain
Mostly Sunny then Slight Chance Light Rain
Driving Route Map
The map below follows the saved road route between Lewiston and Ashton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lewiston and Ashton.
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1
Start on the route
32 m · 10 sec
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2
Turn right onto Idaho Street
1 km · 2 min · Idaho Street
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3
Turn right onto 19th Street
88 m · 18 sec · 19th Street
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4
Turn left onto 7th Avenue
669 ft · 31 sec · 7th Avenue
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5
At the end of the road, turn left onto 21st Street
103 m · 10 sec · 21st Street
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6
Continue straight
1.6 km · 2 min
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7
Keep slight right to continue on US 95 South: Missoula, Boise
7.4 mi · 9 min
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8
Take the exit slight right toward US 12 East
164.2 mi · 3 hr 43 min
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9
Continue straight
32.6 mi · 39 min
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10
Continue straight
7 mi · 9 min
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11
Continue on Brooks Street
3.3 mi · 5 min · Brooks Street
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12
Continue on South Higgins Avenue
109 m · 16 sec · South Higgins Avenue
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13
Turn right onto South 6th Street East
2051 ft · 36 sec · South 6th Street East
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14
Turn left onto Arthur Avenue
906 ft · 14 sec · Arthur Avenue
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15
Continue on Madison Street
1226 ft · 16 sec · Madison Street
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16
Take the exit slight right
1249 ft · 27 sec
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17
Turn left onto Van Buren Street
133 m · 6 sec · Van Buren Street
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18
Take the exit right
1216 ft · 30 sec
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19
Merge slight left onto Jeannette Rankin Memorial Highway
115.1 mi · 1 hr 49 min · Jeannette Rankin Memorial Highway
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20
Keep slight right
33.9 mi · 35 min
-
21
Take the exit slight right toward MT 359: Cardwell, Boulder
1555 ft · 39 sec
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22
Turn right
46 m · 3 sec
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23
Continue straight
14.6 mi · 18 min
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24
At the end of the road, turn right
28 mi · 33 min
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25
At the end of the road, turn left
40.4 mi · 45 min
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26
Turn right
8.6 mi · 13 min
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27
Continue straight
9.1 mi · 12 min
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28
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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29
Turn left onto Main Street
2026 ft · 40 sec · Main Street
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30
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Lewiston and Ashton.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
US 12 East
Take the exit slight right toward US 12 East
164 mi · 03h 43m
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.
Light Rain leaving Lewiston and Mostly Sunny then Slight Chance Light Rain near Ashton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lewiston to Ashton?
The road trip is about 510 miles (820.7 km) and usually takes 10h 08m 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 254.7 miles from Lewiston and 255.3 miles from Ashton.
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 194.4 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 $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 Lewiston and Ashton, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Light Rain around Lewiston and Mostly Sunny then Slight Chance Light Rain near Ashton.
Flight Path Map
This map shows the direct air route between Lewiston and Ashton. Straight-line distance: 315.58 mi (507.87 km).
#1 Lewiston
City in Nez Perce County, Idaho, USA
| Population | 32,788 |
| Coordinates | 46.4165500, -117.0176600 |
| Altitude | 227 |
| 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: 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 11m |
| 60 mph (96.56 km/h) | 08h 29m |
| 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 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.