How far is Sun Prairie, MT from Miles City, MT?
The driving distance from Sun Prairie, MT to Miles City, MT is about 329 miles (529.5 km), with a travel time of about 05h 44m by car.
- The straight-line flight distance is about 277.1 miles (445.9 km).
- For a round trip, plan for roughly 11h 28m 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 44m.
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.
Sunny
Driving Route Map
The map below follows the saved road route between Sun Prairie and Miles City.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sun Prairie and Miles City.
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1
Start on Manchester Lane
1.5 km · 4 min · Manchester Lane
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2
Turn left onto South Manchester Road
2802 ft · 2 min · South Manchester Road
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3
At the end of the road, turn right onto Vaughn South Frontage Road
2437 ft · 56 sec · Vaughn South Frontage Road
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4
Turn left onto North Manchester Road
722 ft · 16 sec · North Manchester Road
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5
Take the ramp right
969 ft · 24 sec
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6
Merge slight left onto First Special Service Force Memorial Highway
5.4 mi · 5 min · First Special Service Force Memorial Highway
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7
Take the exit slight right toward I 15 Business
1262 ft · 31 sec
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8
Turn left onto Central Avenue West
1.5 mi · 2 min · Central Avenue West
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9
Continue on First Avenue North Bridge
1055 ft · 18 sec · First Avenue North Bridge
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10
Continue on 1st Avenue North
1.2 mi · 2 min · 1st Avenue North
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11
Turn right onto 14th Street North
1.3 km · 1 min · 14th Street North
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12
Turn left onto 10th Avenue South
22.6 mi · 25 min · 10th Avenue South
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13
Enter the roundabout and take exit 2 toward the route
68 m · 3 sec
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14
Exit the roundabout
1606 ft · 21 sec
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15
Turn straight
64.3 mi · 1 hr 10 min
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16
Continue straight
14.7 mi · 16 min
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17
Turn straight onto Truck Bypass
2.6 mi · 4 min · Truck Bypass
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18
Continue on 1st Avenue North
1629 ft · 37 sec · 1st Avenue North
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19
Turn left onto East Main Street
1946 ft · 1 min · East Main Street
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20
Continue on Northeast Main Street
1.1 mi · 2 min · Northeast Main Street
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21
Continue on US Highway 87
126.8 mi · 2 hr 16 min · US Highway 87
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22
Turn right
82.6 mi · 2 hr 3 min
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23
Turn left onto Main Street
2357 ft · 52 sec · Main Street
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24
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Sun Prairie 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.
Sunny leaving Sun Prairie and Sunny near Miles City.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sun Prairie to Miles City?
The road trip is about 329 miles (529.5 km) and usually takes 05h 44m 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?
Winnett is a useful midpoint, sitting about 163.6 miles from Sun Prairie and 165.4 miles from Miles City.
How much longer is the road route than the straight-line distance?
The direct path is about 277.1 miles (445.9 km), while the road route adds roughly 51.9 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 5:32 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $52.18 one way or $104.35 round trip. Estimated CO2 is about 103.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Sun Prairie and Sunny near Miles City.
Flight Path Map
This map shows the direct air route between Sun Prairie and Miles City. Straight-line distance: 277.06 mi (445.89 km).
#1 Sun Prairie
Situated in Cascade County at an elevation of 3,340 feet, this central Montana community lies northwest of Great Falls along the Sun River.
| Population | 0 |
| Coordinates | 47.5369000, -111.4813600 |
| Altitude | 1018 |
| 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: 529 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 57m |
| 40 mph (64.37 km/h) | 08h 13m |
| 50 mph (80.47 km/h) | 06h 34m |
| 60 mph (96.56 km/h) | 05h 29m |
| 70 mph (112.65 km/h) | 04h 42m |
| 80 mph (129 km/h) | 04h 06m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.49 | $52.18 | $104.35 |
| Mid-grade | $4.83 | $56.02 | $112.04 |
| Premium | $5.19 | $60.29 | $120.58 |
| Diesel | $6.11 | $70.94 | $141.87 |
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 · Oct 15, 2026