How far is Fort Benton, MT from Miles City, MT?
The driving distance from Fort Benton, MT to Miles City, MT is about 310.7 miles (500.1 km), with a travel time of about 05h 27m by car.
- The straight-line flight distance is about 246.9 miles (397.4 km).
- For a round trip, plan for roughly 10h 55m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 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 05h 27m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Light Rain
Mostly Sunny then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Fort Benton and Miles City.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Benton and Miles City.
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1
Start on the route
24 m · 6 sec
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2
Turn right
59 m · 19 sec
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3
Turn left onto Main Street
1237 ft · 54 sec · Main Street
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4
Turn right onto 12th Street
1366 ft · 1 min · 12th Street
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5
Turn left onto Saint Charles Street
117 m · 11 sec · Saint Charles Street
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6
Continue on MT 386
1.4 mi · 3 min · MT 386
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7
Turn left onto US 87
35.7 mi · 38 min · US 87
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8
Continue on 15th Street Northeast
1.3 mi · 2 min · 15th Street Northeast
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9
Continue on 14th Street North
1.7 mi · 3 min · 14th Street North
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10
Turn left onto 10th Avenue South
22.6 mi · 25 min · 10th Avenue South
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11
Enter the roundabout and take exit 2 toward the route
68 m · 3 sec
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12
Exit the roundabout
1606 ft · 21 sec
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13
Turn straight
64.3 mi · 1 hr 10 min
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14
Continue straight
14.7 mi · 16 min
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15
Turn straight onto Truck Bypass
2.6 mi · 4 min · Truck Bypass
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16
Continue on 1st Avenue North
1629 ft · 37 sec · 1st Avenue North
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17
Turn left onto East Main Street
1946 ft · 1 min · East Main Street
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18
Continue on Northeast Main Street
1.1 mi · 2 min · Northeast Main Street
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19
Continue on US Highway 87
126.8 mi · 2 hr 16 min · US Highway 87
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20
Turn right
82.6 mi · 2 hr 3 min
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21
Turn left onto Main Street
2357 ft · 52 sec · Main Street
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22
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Fort Benton and Miles City.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
US Highway 87
Continue on US Highway 87
127 mi · 02h 16m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Light Rain leaving Fort Benton and Mostly Sunny then Slight Chance Showers And Thunderstorms near Miles City.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fort Benton to Miles City?
The road trip is about 310.7 miles (500.1 km) and usually takes 05h 27m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Grass Range is a useful midpoint, sitting about 178.1 miles from Fort Benton and 132.7 miles from Miles City.
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 63.8 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 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 6:04 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $42.71 one way or $85.41 round trip. Estimated CO2 is about 97.5 kg one way.
What should you check before leaving?
Before you leave, expect Light Rain around Fort Benton and Mostly Sunny then Slight Chance Showers And Thunderstorms near Miles City.
Flight Path Map
This map shows the direct air route between Fort Benton and Miles City. Straight-line distance: 246.93 mi (397.4 km).
#1 Fort Benton
City in Montana, USA
| Population | 1,442 |
| Coordinates | 47.8183000, -110.6674400 |
| Altitude | 799 |
| Country | United States |
#2 Miles City
City in Custer County, Montana
| Population | 8,264 |
| Coordinates | 46.4083400, -105.8405600 |
| Altitude | 722 |
| Country | United States |
End: Main Street (-105.84056, 46.408351)
Estimated Travel Time
Distance: 500 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 21m |
| 40 mph (64.37 km/h) | 07h 46m |
| 50 mph (80.47 km/h) | 06h 12m |
| 60 mph (96.56 km/h) | 05h 10m |
| 70 mph (112.65 km/h) | 04h 26m |
| 80 mph (129 km/h) | 03h 52m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $42.71 | $85.41 |
| Mid-grade | $4.23 | $46.41 | $92.83 |
| Premium | $4.55 | $49.90 | $99.81 |
| Diesel | $5.41 | $59.37 | $118.74 |
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.