How far is Great Falls, MT from Helena, MT?
The driving distance from Great Falls, MT to Helena, MT is about 89.9 miles (144.6 km), with a travel time of about 01h 25m by car.
- The straight-line flight distance is about 71.6 miles (115.3 km).
- For a round trip, plan for roughly 02h 50m 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 25m.
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 Cascade County, Montana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Showers And Thunderstorms Likely
Chance Light Rain then Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Great Falls and Helena.
Turn-by-Turn Driving Directions
Step-by-step road directions between Great Falls and Helena.
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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 · 38 sec · 5th Street South
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4
Turn right onto 10th Avenue South
1.2 km · 1 min · 10th Avenue South
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5
Continue on Country Club Boulevard
1.3 mi · 2 min · Country Club Boulevard
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6
Keep slight left
1.2 km · 2 min
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7
Merge slight left onto First Special Service Force Memorial Highway
84.5 mi · 1 hr 21 min · First Special Service Force Memorial Highway
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8
Take the exit slight right toward I 15 Business
1393 ft · 35 sec
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9
At the end of the road, turn right onto Cedar Street
2855 ft · 1 min · Cedar Street
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10
Continue on North Last Chance Gulch Street
1.2 mi · 3 min · North Last Chance Gulch Street
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11
Turn slight left onto Cruse Avenue
31 m · 4 sec · Cruse Avenue
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12
Arrive at your destination
0 m · 1 sec · Cruse Avenue
Car Route Details
A richer read on the saved driving route between Great Falls and Helena.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
First Special Service Force Memorial Highway
Merge slight left onto First Special Service Force Memorial Highway
84.5 mi · 01h 21m
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 Great Falls and Chance Light Rain then Showers And Thunderstorms near Helena.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Great Falls to Helena?
The road trip is about 89.9 miles (144.6 km) and usually takes 01h 25m 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?
Cascade is a useful midpoint, sitting about 44.9 miles from Great Falls and 45 miles from Helena.
How much longer is the road route than the straight-line distance?
The direct path is about 71.6 miles (115.3 km), while the road route adds roughly 18.3 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 3:40 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $12.34 one way or $24.68 round trip. Estimated CO2 is about 28.2 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Showers And Thunderstorms Likely around Great Falls and Chance Light Rain then Showers And Thunderstorms near Helena.
Flight Path Map
This map shows the direct air route between Great Falls and Helena. Straight-line distance: 71.63 mi (115.27 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 Helena
State capital of Montana, United States and seat of Lewis and Clark County
| Population | 33,737 |
| Coordinates | 46.5927100, -112.0361100 |
| Altitude | 1237 |
| Country | United States |
End: Cruse Avenue (-112.036062, 46.592722)
Estimated Travel Time
Distance: 145 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 59m |
| 40 mph (64.37 km/h) | 02h 14m |
| 50 mph (80.47 km/h) | 01h 47m |
| 60 mph (96.56 km/h) | 01h 29m |
| 70 mph (112.65 km/h) | 01h 16m |
| 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 | $12.34 | $24.68 |
| Mid-grade | $4.23 | $13.41 | $26.82 |
| Premium | $4.55 | $14.42 | $28.84 |
| Diesel | $5.41 | $17.16 | $34.31 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.