How far is American Falls, ID from Lewiston, ID?
The driving distance from American Falls, ID to Lewiston, ID is about 503.6 miles (810.5 km), with a travel time of about 08h 09m by car.
- The straight-line flight distance is about 323.7 miles (521 km).
- For a round trip, plan for roughly 16h 18m 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 08h 09m.
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 Boise 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 American Falls and Lewiston.
Turn-by-Turn Driving Directions
Step-by-step road directions between American Falls and Lewiston.
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1
Start on the route
53 m · 15 sec
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2
Turn right onto Fort Hall Avenue
2888 ft · 57 sec · Fort Hall Avenue
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3
Continue on Lincoln Street
2230 ft · 38 sec · Lincoln Street
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4
Continue on South Frontage Road
2 mi · 3 min · South Frontage Road
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5
Take the ramp right
1188 ft · 29 sec
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6
Merge slight left
36.4 mi · 34 min
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7
Continue on Vietnam Veterans Memorial Highway
171.2 mi · 2 hr 42 min · Vietnam Veterans Memorial Highway
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8
Take the exit slight right toward Cole Road, Overland Road
1061 ft · 26 sec
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9
Keep slight left to continue on Cole Road
71 m · 13 sec
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10
Turn left onto South Cole Road
1.3 km · 2 min · South Cole Road
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11
Continue on North Cole Road
2.6 mi · 6 min · North Cole Road
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12
At the end of the road, turn left onto North Mountain View Drive
1056 ft · 39 sec · North Mountain View Drive
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13
Turn right onto North Glenwood Street
1.7 mi · 4 min · North Glenwood Street
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14
Turn left onto West State Street
2.3 mi · 4 min · West State Street
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15
Take the ramp slight right toward SH-55
156 m · 14 sec
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16
Merge slight left onto North Horseshoe Bend Road
8.8 mi · 12 min · North Horseshoe Bend Road
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17
Continue on Payette River Scenic Byway
5.9 mi · 7 min · Payette River Scenic Byway
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18
Continue on Highway 55
2.4 mi · 3 min · Highway 55
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19
Continue on Horseshoe Bend Road
2105 ft · 30 sec · Horseshoe Bend Road
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20
Continue on Highway 55
16 mi · 24 min · Highway 55
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21
Continue on Horseshoe Bend Road
18.5 mi · 25 min · Horseshoe Bend Road
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22
Continue on Main Street
45.6 mi · 1 hr 2 min · Main Street
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23
Turn left onto Deinhard Lane
1.6 mi · 3 min · Deinhard Lane
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24
Continue on Boydstun Street
1.5 km · 2 min · Boydstun Street
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25
At the end of the road, turn left onto West Lake Street
10.6 mi · 16 min · West Lake Street
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26
Turn right onto North Norris Avenue
76.4 mi · 1 hr 27 min · North Norris Avenue
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27
Turn left onto Johnston Road
2.2 mi · 5 min · Johnston Road
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28
At the end of the road, turn left
67.5 mi · 1 hr 19 min
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29
Keep slight left to continue on Lewiston
1.6 mi · 3 min
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30
Turn right onto Idaho Street
1.2 km · 2 min · Idaho Street
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31
Turn left
32 m · 8 sec
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32
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between American Falls and Lewiston.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Vietnam Veterans Memorial Highway
Continue on Vietnam Veterans Memorial Highway
171 mi · 02h 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 American Falls and Mostly Sunny near Lewiston.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from American Falls to Lewiston?
The road trip is about 503.6 miles (810.5 km) and usually takes 08h 09m 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?
Horseshoe Bend is a useful midpoint, sitting about 238.8 miles from American Falls and 264.8 miles from Lewiston.
How much longer is the road route than the straight-line distance?
The direct path is about 323.7 miles (521 km), while the road route adds roughly 179.9 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 $69.18 one way or $138.36 round trip. Estimated CO2 is about 157.9 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between American Falls 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 American Falls and Mostly Sunny near Lewiston.
Stop Ideas Near Horseshoe Bend
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Horseshoe Bend.
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Flight Path Map
This map shows the direct air route between American Falls and Lewiston. Straight-line distance: 323.74 mi (521.01 km).
#1 American Falls
City in Idaho
| Population | 4,315 |
| Coordinates | 42.7860200, -112.8544400 |
| Altitude | 1343 |
| 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: 810 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 16h 46m |
| 40 mph (64.37 km/h) | 12h 35m |
| 50 mph (80.47 km/h) | 10h 04m |
| 60 mph (96.56 km/h) | 08h 23m |
| 70 mph (112.65 km/h) | 07h 11m |
| 80 mph (129 km/h) | 06h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $69.18 | $138.36 |
| Mid-grade | $4.23 | $75.18 | $150.37 |
| Premium | $4.55 | $80.84 | $161.67 |
| Diesel | $5.41 | $96.17 | $192.34 |
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 · May 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.