How far is Great Falls, MT from Lewistown, MT?
The driving distance from Great Falls, MT to Lewistown, MT is about 105.4 miles (169.7 km), with a travel time of about 01h 48m by car.
- The straight-line flight distance is about 92.8 miles (149.4 km).
- For a round trip, plan for roughly 03h 37m 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 48m.
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.
Town in Montana
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 Great Falls and Lewistown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Great Falls and Lewistown.
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1
Start on 4th Street South
49 m · 12 sec · 4th Street South
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2
Turn left onto 5th Avenue South
130 m · 21 sec · 5th Avenue South
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3
Turn right onto 5th Street South
1988 ft · 36 sec · 5th Street South
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4
Turn left onto 10th Avenue South
5.7 mi · 8 min · 10th Avenue South
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5
Continue straight
17.6 mi · 19 min
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6
Enter the roundabout and take exit 2 toward the route
68 m · 3 sec
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7
Exit the roundabout
1606 ft · 21 sec
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8
Turn straight
64.3 mi · 1 hr 10 min
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9
Continue straight
14.7 mi · 16 min
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10
Continue on US Highway 87
1.5 mi · 2 min · US Highway 87
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11
Continue on West Main Street
1.3 km · 2 min · West Main Street
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12
Turn right onto 6th Avenue South
121 m · 17 sec · 6th Avenue South
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13
Arrive at your destination
0 m · 1 sec · 6th Avenue South
Car Route Details
A richer read on the saved driving route between Great Falls and Lewistown.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Longest stretch
Turn straight
64.3 mi · 01h 10m
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.
Rain leaving Great Falls and Rain near Lewistown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Great Falls to Lewistown?
The road trip is about 105.4 miles (169.7 km) and usually takes 01h 48m 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?
Stanford is a useful midpoint, sitting about 52.6 miles from Great Falls and 52.8 miles from Lewistown.
How much longer is the road route than the straight-line distance?
The direct path is about 92.8 miles (149.4 km), while the road route adds roughly 12.6 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 2:52 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $14.48 one way or $28.96 round trip. Estimated CO2 is about 33.1 kg one way.
What should you check before leaving?
Before you leave, expect Rain around Great Falls and Rain near Lewistown.
Flight Path Map
This map shows the direct air route between Great Falls and Lewistown. Straight-line distance: 92.83 mi (149.4 km).
#1 Great Falls
Town in Cascade County, Montana, United States
| Population | 58,353 |
| Coordinates | 47.5002400, -111.3008100 |
| Altitude | 1015 |
| Country | United States |
#2 Lewistown
City in Montana, United States
| Population | 5,905 |
| Coordinates | 47.0624700, -109.4282400 |
| Altitude | 1203 |
| Country | United States |
End: 6th Avenue South (-109.428026, 47.06261)
Estimated Travel Time
Distance: 170 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 30m |
| 40 mph (64.37 km/h) | 02h 38m |
| 50 mph (80.47 km/h) | 02h 06m |
| 60 mph (96.56 km/h) | 01h 45m |
| 70 mph (112.65 km/h) | 01h 30m |
| 80 mph (129 km/h) | 01h 18m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $14.48 | $28.96 |
| Mid-grade | $4.23 | $15.74 | $31.48 |
| Premium | $4.55 | $16.92 | $33.84 |
| Diesel | $5.41 | $20.13 | $40.27 |
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 Montana · Jun 01, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.