How far is Dillon, MT from Helena, MT?
The driving distance from Dillon, MT to Helena, MT is about 131 miles (210.9 km), with a travel time of about 02h 05m by car.
- The straight-line flight distance is about 99.4 miles (160 km).
- For a round trip, plan for roughly 04h 11m 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 02h 05m.
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.
Consolidated city-county in Montana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Light Rain then Showers And Thunderstorms Likely
Chance Light Rain then Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Dillon and Helena.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dillon and Helena.
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1
Start on South Idaho Street
107 m · 21 sec · South Idaho Street
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2
Turn left onto East Bannack Street
1489 ft · 41 sec · East Bannack Street
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3
Continue on Black Tail Boulevard
2999 ft · 1 min · Black Tail Boulevard
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4
Turn left
127 m · 7 sec
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5
Take the ramp straight
57 m · 5 sec
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6
Keep slight right
60.6 mi · 57 min
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7
Keep slight right
4.8 mi · 5 min
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8
Take the exit slight right toward I 15 North: Helena
62.2 mi · 1 hr 1 min
-
9
Take the exit slight right toward I 15 Business, US 12, US 287: Townsend, Capitol Area
1583 ft · 41 sec
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10
Continue on Prospect Avenue
1.2 mi · 3 min · Prospect Avenue
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11
Turn left onto North Montana Avenue
146 m · 18 sec · North Montana Avenue
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12
Turn right onto 11th Avenue
1.3 km · 2 min · 11th Avenue
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13
Turn right onto Cruse Avenue
50 m · 6 sec · Cruse Avenue
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14
Arrive at your destination
0 m · 1 sec · Cruse Avenue
Car Route Details
A richer read on the saved driving route between Dillon and Helena.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
I 15 North
Take the exit slight right toward I 15 North: Helena
62.2 mi · 01h 01m
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 Showers And Thunderstorms Likely leaving Dillon 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 Dillon to Helena?
The road trip is about 131 miles (210.9 km) and usually takes 02h 05m 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?
Butte is a useful midpoint, sitting about 65.4 miles from Dillon and 65.6 miles from Helena.
How much longer is the road route than the straight-line distance?
The direct path is about 99.4 miles (160 km), while the road route adds roughly 31.6 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 2:18 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $18.02 one way or $36.05 round trip. Estimated CO2 is about 41.1 kg one way.
What should you check before leaving?
Before you leave, expect Chance Light Rain then Showers And Thunderstorms Likely around Dillon and Chance Light Rain then Showers And Thunderstorms near Helena.
Flight Path Map
This map shows the direct air route between Dillon and Helena. Straight-line distance: 99.4 mi (159.97 km).
#1 Dillon
City in Montana, United States
| Population | 4,333 |
| Coordinates | 45.2163100, -112.6375200 |
| Altitude | 1555 |
| 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: 211 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 22m |
| 40 mph (64.37 km/h) | 03h 16m |
| 50 mph (80.47 km/h) | 02h 37m |
| 60 mph (96.56 km/h) | 02h 11m |
| 70 mph (112.65 km/h) | 01h 52m |
| 80 mph (129 km/h) | 01h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $18.02 | $36.05 |
| Mid-grade | $4.23 | $19.59 | $39.18 |
| Premium | $4.55 | $21.06 | $42.12 |
| Diesel | $5.41 | $25.06 | $50.12 |
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.