How far is Lewiston, ID from Idaho Falls, ID?
The driving distance from Lewiston, ID to Idaho Falls, ID is about 550 miles (885.1 km), with a travel time of about 09h 03m by car.
- The straight-line flight distance is about 317.6 miles (511.1 km).
- For a round trip, plan for roughly 18h 07m 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 09h 03m.
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.
Driving Route Map
The map below follows the saved road route between Lewiston and Idaho Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lewiston and Idaho Falls.
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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
111.5 mi · 1 hr 46 min · Jeannette Rankin Memorial Highway
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20
Take the exit slight right toward I 15 South: Dillon, Idaho Falls
2694 ft · 1 min
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21
Merge slight left
198 mi · 3 hr 6 min
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22
Take the exit slight right toward I 15 Business, US 20 West: Historic Downtown, Arco
1619 ft · 47 sec
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23
Continue on West Broadway Street
2164 ft · 54 sec · West Broadway Street
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24
Turn right onto South Utah Avenue
2435 ft · 50 sec · South Utah Avenue
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25
Enter the roundabout and take exit 1 toward South Utah Avenue
31 m · 2 sec · South Utah Avenue
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26
Exit the roundabout onto South Utah Avenue
781 ft · 23 sec · South Utah Avenue
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27
Turn left onto Pancheri Drive
1930 ft · 43 sec · Pancheri Drive
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28
Continue on West 17th Street
3067 ft · 58 sec · West 17th Street
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29
Turn right onto South Boulevard
1.6 km · 3 min · South Boulevard
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30
Continue on Stonebrook Lane
142 m · 15 sec · Stonebrook Lane
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31
Turn right onto West Stone Run Lane
74 m · 16 sec · West Stone Run Lane
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32
Turn left onto Charleston Lane
46 m · 7 sec · Charleston Lane
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33
Arrive at your destination
0 m · 1 sec · Charleston Lane
Car Route Details
A richer read on the saved driving route between Lewiston and Idaho Falls.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 15 South
Merge slight left
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.
Mostly Sunny leaving Lewiston and Sunny near Idaho Falls.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lewiston to Idaho Falls?
The road trip is about 550 miles (885.1 km) and usually takes 09h 03m 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 265.3 miles from Lewiston and 284.7 miles from Idaho Falls.
How much longer is the road route than the straight-line distance?
The direct path is about 317.6 miles (511.1 km), while the road route adds roughly 232.4 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 $75.56 one way or $151.13 round trip. Estimated CO2 is about 172.5 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Lewiston and Idaho Falls, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Lewiston and Sunny near Idaho Falls.
Flight Path Map
This map shows the direct air route between Lewiston and Idaho Falls. Straight-line distance: 317.61 mi (511.14 km).
#1 Lewiston
City in Nez Perce County, Idaho, USA
| Population | 32,788 |
| Coordinates | 46.4165500, -117.0176600 |
| Altitude | 227 |
| Country | United States |
#2 Idaho Falls
The most populous city in Bonneville County, Idaho.
| Population | 62,888 |
| Coordinates | 43.4665800, -112.0341400 |
| Altitude | 1434 |
| Country | United States |
End: Charleston Lane (-112.034479, 43.46658)
Estimated Travel Time
Distance: 885 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 18h 19m |
| 40 mph (64.37 km/h) | 13h 45m |
| 50 mph (80.47 km/h) | 10h 59m |
| 60 mph (96.56 km/h) | 09h 10m |
| 70 mph (112.65 km/h) | 07h 51m |
| 80 mph (129 km/h) | 06h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $75.56 | $151.13 |
| Mid-grade | $4.23 | $82.12 | $164.25 |
| Premium | $4.55 | $88.30 | $176.59 |
| Diesel | $5.41 | $105.05 | $210.09 |
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 12, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.