How far is Ammon, ID from Lewiston, ID?
The driving distance from Ammon, ID to Lewiston, ID is about 576.9 miles (928.4 km), with a travel time of about 09h 07m by car.
- The straight-line flight distance is about 320 miles (515 km).
- For a round trip, plan for roughly 18h 15m 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.
Light Rain Likely then Showers And Thunderstorms
Rain Showers
Driving Route Map
The map below follows the saved road route between Ammon and Lewiston.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ammon and Lewiston.
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1
Start on Molen Street
41 m · 12 sec · Molen Street
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2
Turn left onto Central Avenue
753 ft · 35 sec · Central Avenue
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3
Turn right onto East Sunnyside Road
2.9 mi · 5 min · East Sunnyside Road
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4
Turn right onto South Holmes Avenue
1.6 km · 2 min · South Holmes Avenue
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5
Turn left onto East 17th Street
1.1 mi · 2 min · East 17th Street
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6
Continue on Pancheri Drive
1964 ft · 47 sec · Pancheri Drive
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7
Turn right onto South Utah Avenue
776 ft · 16 sec · South Utah Avenue
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8
Enter the roundabout and take exit 2 toward South Utah Avenue
68 m · 4 sec · South Utah Avenue
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9
Exit the roundabout onto South Utah Avenue
2440 ft · 58 sec · South Utah Avenue
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10
Turn left onto West Broadway Street
1513 ft · 35 sec · West Broadway Street
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11
Take the ramp right toward I15 North: Roberts, Butte
1128 ft · 28 sec
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12
Merge slight left onto Veterans Memorial Highway
198.2 mi · 3 hr 6 min · Veterans Memorial Highway
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13
Take the exit slight left toward I 90 West: Missoula
2808 ft · 1 min
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14
Merge slight left onto I 90 West: Missoula
112.1 mi · 1 hr 46 min
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15
Take the exit slight right toward US 12 West, I 90 Business
1037 ft · 26 sec
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16
Enter the roundabout and take exit 3 toward Van Buren Street
63 m · 3 sec · Van Buren Street
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17
Exit the roundabout onto Van Buren Street
65 m · 4 sec · Van Buren Street
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18
Enter the roundabout and take exit 1 toward Van Buren Street
28 m · 1 sec · Van Buren Street
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19
Exit the roundabout onto Van Buren Street
583 ft · 11 sec · Van Buren Street
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20
Turn right onto East Broadway Street
1143 ft · 23 sec · East Broadway Street
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21
Turn left onto Madison Street
1419 ft · 18 sec · Madison Street
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22
Continue on Arthur Avenue
543 ft · 9 sec · Arthur Avenue
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23
Turn right onto South 5th Street East
2052 ft · 36 sec · South 5th Street East
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24
Turn left onto South Higgins Avenue
716 ft · 28 sec · South Higgins Avenue
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25
Turn right onto Brooks Street
3.3 mi · 5 min · Brooks Street
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26
Continue on Bitteroot Road
3 mi · 4 min · Bitteroot Road
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27
Continue on US Highway 93 South
4 mi · 6 min · US Highway 93 South
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28
Turn right onto Lolo Creek Road
32.6 mi · 39 min · Lolo Creek Road
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29
Continue straight
163.6 mi · 3 hr 42 min
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30
Take the exit slight right
7.5 mi · 9 min
-
31
Keep slight left to continue on Lewiston
1.6 mi · 3 min
-
32
Turn right onto Idaho Street
1.2 km · 2 min · Idaho Street
-
33
Turn left
32 m · 8 sec
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34
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Ammon and Lewiston.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Veterans Memorial Highway
Merge slight left onto Veterans Memorial Highway
198 mi · 03h 06m
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 Likely then Showers And Thunderstorms leaving Ammon and Rain Showers near Lewiston.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ammon to Lewiston?
The road trip is about 576.9 miles (928.4 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 267.4 miles from Ammon and 309.5 miles from Lewiston.
How much longer is the road route than the straight-line distance?
The direct path is about 320 miles (515 km), while the road route adds roughly 256.9 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 $79.22 one way or $158.45 round trip. Estimated CO2 is about 180.9 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Ammon and Lewiston, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Light Rain Likely then Showers And Thunderstorms around Ammon and Rain Showers near Lewiston.
Flight Path Map
This map shows the direct air route between Ammon and Lewiston. Straight-line distance: 320.01 mi (515 km).
#1 Ammon
City in Idaho, United States
| Population | 17,115 |
| Coordinates | 43.4696400, -111.9666400 |
| Altitude | 1437 |
| 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: 928 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 19h 13m |
| 40 mph (64.37 km/h) | 14h 25m |
| 50 mph (80.47 km/h) | 11h 32m |
| 60 mph (96.56 km/h) | 09h 36m |
| 70 mph (112.65 km/h) | 08h 14m |
| 80 mph (129 km/h) | 07h 11m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $79.22 | $158.45 |
| Mid-grade | $4.23 | $86.10 | $172.20 |
| Premium | $4.55 | $92.57 | $185.14 |
| Diesel | $5.41 | $110.13 | $220.27 |
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 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.