How far is Miles City, MT from Fort Benton, MT?
The driving distance from Miles City, MT to Fort Benton, MT is about 356.9 miles (574.4 km), with a travel time of about 07h 07m by car.
- The straight-line flight distance is about 246.9 miles (397.4 km).
- For a round trip, plan for roughly 14h 15m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 07h 07m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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 of the United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Showers And Thunderstorms
Light Rain
Driving Route Map
The map below follows the saved road route between Miles City and Fort Benton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Miles City and Fort Benton.
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1
Start on Main Street
2357 ft · 56 sec · Main Street
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2
Turn right onto North 7th Street
82.6 mi · 2 hr 3 min · North 7th Street
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3
At the end of the road, turn left
128.3 mi · 2 hr 19 min
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4
Turn right onto 1st Avenue North
1629 ft · 30 sec · 1st Avenue North
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5
Continue on Truck Bypass
2.6 mi · 4 min · Truck Bypass
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6
Continue on US Highway 87
14.7 mi · 16 min · US Highway 87
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7
Continue straight
64.3 mi · 1 hr 10 min
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8
Turn slight right
1588 ft · 21 sec
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9
Enter the roundabout and take exit 2 toward the route
52 m · 2 sec
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10
Exit the roundabout
557 ft · 7 sec
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11
Continue straight
19.3 mi · 21 min
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12
Turn right onto 57th Street South
1.6 mi · 2 min · 57th Street South
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13
Continue on River Drive North
3.4 mi · 5 min · River Drive North
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14
Turn right onto 15th Street North
36.9 mi · 40 min · 15th Street North
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15
Turn right onto MT 386
1.4 mi · 3 min · MT 386
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16
Continue on Saint Charles Street
117 m · 13 sec · Saint Charles Street
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17
Turn right onto 12th Street
1366 ft · 1 min · 12th Street
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18
Turn left onto Main Street
1237 ft · 57 sec · Main Street
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19
Turn right
83 m · 21 sec
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20
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Miles City and Fort Benton.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Longest stretch
At the end of the road, turn left
128 mi · 02h 19m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny then Slight Chance Showers And Thunderstorms leaving Miles City and Light Rain near Fort Benton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Miles City to Fort Benton?
The road trip is about 356.9 miles (574.4 km) and usually takes 07h 07m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Grass Range is a useful midpoint, sitting about 178.1 miles from Miles City and 178.8 miles from Fort Benton.
How much longer is the road route than the straight-line distance?
The direct path is about 246.9 miles (397.4 km), while the road route adds roughly 110 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 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $49.01 one way or $98.03 round trip. Estimated CO2 is about 111.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Showers And Thunderstorms around Miles City and Light Rain near Fort Benton.
Flight Path Map
This map shows the direct air route between Miles City and Fort Benton. Straight-line distance: 246.93 mi (397.4 km).
#1 Miles City
City in Custer County, Montana
| Population | 8,264 |
| Coordinates | 46.4083400, -105.8405600 |
| Altitude | 722 |
| Country | United States |
#2 Fort Benton
City in Montana, USA
| Population | 1,442 |
| Coordinates | 47.8183000, -110.6674400 |
| Altitude | 799 |
| Country | United States |
End: Fort Benton (-110.66744, 47.8183)
Estimated Travel Time
Distance: 574 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 53m |
| 40 mph (64.37 km/h) | 08h 55m |
| 50 mph (80.47 km/h) | 07h 08m |
| 60 mph (96.56 km/h) | 05h 56m |
| 70 mph (112.65 km/h) | 05h 05m |
| 80 mph (129 km/h) | 04h 27m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $49.01 | $98.03 |
| Mid-grade | $4.23 | $53.27 | $106.54 |
| Premium | $4.55 | $57.27 | $114.54 |
| Diesel | $5.41 | $68.14 | $136.27 |
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 02, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.