How far is Lewistown, MT from Great Falls, MT?
The driving distance from Lewistown, MT to Great Falls, MT is about 105.4 miles (169.7 km), with a travel time of about 01h 50m by car.
- The straight-line flight distance is about 92.8 miles (149.4 km).
- For a round trip, plan for roughly 03h 40m 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 50m.
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.
Partly Sunny then Showers And Thunderstorms Likely
Partly Sunny then Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Lewistown and Great Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lewistown and Great Falls.
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1
Start on 6th Avenue South
121 m · 23 sec · 6th Avenue South
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2
Turn left onto West Main Street
1.3 km · 2 min · West Main Street
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3
Continue on US Highway 87
1.5 mi · 2 min · US Highway 87
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4
At the end of the road, turn left onto US Highway 87
14.7 mi · 16 min · US Highway 87
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5
Continue straight
64.3 mi · 1 hr 10 min
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6
Turn slight right
1588 ft · 21 sec
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7
Enter the roundabout and take exit 2 toward the route
52 m · 2 sec
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8
Exit the roundabout
557 ft · 7 sec
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9
Continue straight
23.1 mi · 29 min
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10
Turn right onto 6th Street South
1989 ft · 39 sec · 6th Street South
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11
Turn left onto 5th Avenue South
864 ft · 40 sec · 5th Avenue South
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12
Turn right onto 4th Street South
49 m · 7 sec · 4th Street South
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13
Arrive at your destination
0 m · 1 sec · 4th Street South
Car Route Details
A richer read on the saved driving route between Lewistown and Great 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.
US Highway 87
Continue 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.
Partly Sunny then Showers And Thunderstorms Likely leaving Lewistown and Partly Sunny then Showers And Thunderstorms Likely near Great Falls.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lewistown to Great Falls?
The road trip is about 105.4 miles (169.7 km) and usually takes 01h 50m 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 Lewistown and 52.8 miles from Great Falls.
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 2:50 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 Partly Sunny then Showers And Thunderstorms Likely around Lewistown and Partly Sunny then Showers And Thunderstorms Likely near Great Falls.
Flight Path Map
This map shows the direct air route between Lewistown and Great Falls. Straight-line distance: 92.83 mi (149.4 km).
#1 Lewistown
City in Montana, United States
| Population | 5,905 |
| Coordinates | 47.0624700, -109.4282400 |
| Altitude | 1203 |
| Country | United States |
#2 Great Falls
Town in Cascade County, Montana, United States
| Population | 58,353 |
| Coordinates | 47.5002400, -111.3008100 |
| Altitude | 1015 |
| Country | United States |
End: 4th Street South (-111.300848, 47.50024)
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 · 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.