How far is Twin Falls, ID from American Falls, ID?
The driving distance from Twin Falls, ID to American Falls, ID is about 90.1 miles (145 km), with a travel time of about 01h 33m by car.
- The straight-line flight distance is about 83 miles (133.6 km).
- For a round trip, plan for roughly 03h 06m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 01h 33m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 Cassia County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Light Rain then Rain Showers Likely
Chance Light Rain
Driving Route Map
The map below follows the saved road route between Twin Falls and American Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Twin Falls and American Falls.
-
1
Start on Shoshone Street East
1.2 km · 1 min · Shoshone Street East
-
2
Turn left onto 2nd Avenue South
1.2 km · 1 min · 2nd Avenue South
-
3
Continue on Kimberly Road
4.9 mi · 7 min · Kimberly Road
-
4
Continue on East 3800 North
4.2 mi · 6 min · East 3800 North
-
5
Continue on ID 50
2114 ft · 28 sec · ID 50
-
6
Take the ramp straight
2203 ft · 54 sec
-
7
Merge slight left onto Vietnam Veterans Memorial Highway
39.1 mi · 37 min · Vietnam Veterans Memorial Highway
-
8
Continue straight
36.4 mi · 34 min
-
9
Take the exit slight right toward I 86 Business, ID 37: Rockland, American Falls
1082 ft · 29 sec
-
10
Turn left onto South Frontage Road
2.1 mi · 3 min · South Frontage Road
-
11
Continue on Lincoln Street
2230 ft · 38 sec · Lincoln Street
-
12
Continue on Fort Hall Avenue
2888 ft · 1 min · Fort Hall Avenue
-
13
Turn left
53 m · 13 sec
-
14
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Twin Falls and American Falls.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Vietnam Veterans Memorial Highway
Merge slight left onto Vietnam Veterans Memorial Highway
39.1 mi · 00h 37m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Chance Light Rain then Rain Showers Likely leaving Twin Falls and Chance Light Rain near American Falls.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Twin Falls to American Falls?
The road trip is about 90.1 miles (145 km) and usually takes 01h 33m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Declo is a useful midpoint, sitting about 44.9 miles from Twin Falls and 45.2 miles from American Falls.
How much longer is the road route than the straight-line distance?
The direct path is about 83 miles (133.6 km), while the road route adds roughly 7.1 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 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 3:24 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $12.38 one way or $24.76 round trip. Estimated CO2 is about 28.3 kg one way.
What should you check before leaving?
Before you leave, expect Chance Light Rain then Rain Showers Likely around Twin Falls and Chance Light Rain near American Falls.
Stop Ideas Near Declo
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 Declo.
Twin Falls, Idaho
Flight Path Map
This map shows the direct air route between Twin Falls and American Falls. Straight-line distance: 83.05 mi (133.65 km).
#1 Twin Falls
The most populous city in Twin Falls County, Idaho.
| Population | 50,197 |
| Coordinates | 42.5629700, -114.4608700 |
| Altitude | 1138 |
| Country | United States |
#2 American Falls
City in Idaho
| Population | 4,315 |
| Coordinates | 42.7860200, -112.8544400 |
| Altitude | 1343 |
| Country | United States |
End: American Falls (-112.85444, 42.78602)
Estimated Travel Time
Distance: 145 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 00m |
| 40 mph (64.37 km/h) | 02h 15m |
| 50 mph (80.47 km/h) | 01h 48m |
| 60 mph (96.56 km/h) | 01h 30m |
| 70 mph (112.65 km/h) | 01h 17m |
| 80 mph (129 km/h) | 01h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $12.38 | $24.76 |
| Mid-grade | $4.23 | $13.45 | $26.91 |
| Premium | $4.55 | $14.47 | $28.93 |
| Diesel | $5.41 | $17.21 | $34.42 |
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.