How far is Miles City, MT from Sun Prairie, MT?
The driving distance from Miles City, MT to Sun Prairie, MT is about 328 miles (527.9 km), with a travel time of about 06h 39m by car.
- The straight-line flight distance is about 277.1 miles (445.9 km).
- For a round trip, plan for roughly 13h 19m 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 06h 39m.
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.
Driving Route Map
The map below follows the saved road route between Miles City and Sun Prairie.
Turn-by-Turn Driving Directions
Step-by-step road directions between Miles City and Sun Prairie.
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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
1.5 km · 1 min · 57th Street South
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13
Turn left onto 2nd Avenue North
4.3 mi · 8 min · 2nd Avenue North
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14
At the end of the road, turn left onto Park Drive North
73 m · 4 sec · Park Drive North
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15
Turn right onto 1st Avenue North
1070 ft · 24 sec · 1st Avenue North
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16
Continue on First Avenue North Bridge
1045 ft · 18 sec · First Avenue North Bridge
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17
Continue on Central Avenue West
1.4 mi · 2 min · Central Avenue West
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18
Take the exit right
1311 ft · 32 sec
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19
Merge slight left onto First Special Service Force Memorial Highway
5.5 mi · 6 min · First Special Service Force Memorial Highway
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20
Take the exit slight right
877 ft · 28 sec
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21
Turn left onto North Manchester Road
1144 ft · 27 sec · North Manchester Road
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22
At the end of the road, turn right onto Vaughn South Frontage Road
2437 ft · 55 sec · Vaughn South Frontage Road
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23
Turn left onto South Manchester Road
2802 ft · 2 min · South Manchester Road
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24
Turn right onto Manchester Lane
1.5 km · 4 min · Manchester Lane
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25
Arrive at your destination
0 m · 1 sec · Manchester Lane
Car Route Details
A richer read on the saved driving route between Miles City and Sun Prairie.
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.
Sunny leaving Miles City and Sunny near Sun Prairie.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Miles City to Sun Prairie?
The road trip is about 328 miles (527.9 km) and usually takes 06h 39m 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?
Winnett is a useful midpoint, sitting about 163.7 miles from Miles City and 164.4 miles from Sun Prairie.
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 50.9 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 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 $52.04 one way or $104.08 round trip. Estimated CO2 is about 102.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Miles City and Sunny near Sun Prairie.
Flight Path Map
This map shows the direct air route between Miles City and Sun Prairie. Straight-line distance: 277.06 mi (445.89 km).
#1 Miles City
City in Custer County, Montana
| Population | 8,264 |
| Coordinates | 46.4083400, -105.8405600 |
| Altitude | 722 |
| Country | United States |
#2 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 |
End: Sun Prairie (-111.48136, 47.5369)
Estimated Travel Time
Distance: 528 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 55m |
| 40 mph (64.37 km/h) | 08h 12m |
| 50 mph (80.47 km/h) | 06h 33m |
| 60 mph (96.56 km/h) | 05h 28m |
| 70 mph (112.65 km/h) | 04h 41m |
| 80 mph (129 km/h) | 04h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.49 | $52.04 | $104.08 |
| Mid-grade | $4.83 | $55.87 | $111.75 |
| Premium | $5.19 | $60.13 | $120.27 |
| Diesel | $6.11 | $70.75 | $141.51 |
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