How far is Miles City, MT from Big Sky, MT?
The driving distance from Miles City, MT to Big Sky, MT is about 336.7 miles (541.9 km), with a travel time of about 05h 59m by car.
- The straight-line flight distance is about 277.1 miles (445.9 km).
- For a round trip, plan for roughly 11h 58m 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 59m.
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.
City in Yellowstone County, Montana, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Miles City and Big Sky.
Turn-by-Turn Driving Directions
Step-by-step road directions between Miles City and Big Sky.
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1
Start on Main Street
1.1 mi · 2 min · Main Street
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2
Continue straight
1.9 mi · 3 min
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3
Take the ramp straight
20 m · 2 sec
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4
Keep slight right
1487 ft · 36 sec
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5
Merge slight left
135.4 mi · 2 hr 19 min
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6
Merge slight left
2.8 mi · 3 min
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7
Continue straight
112.8 mi · 1 hr 52 min
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8
Continue straight
7 mi · 7 min
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9
Continue straight
25.7 mi · 26 min
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10
Take the exit slight right toward MT 205
1505 ft · 39 sec
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11
Turn left onto North 7th Avenue
1.3 mi · 2 min · North 7th Avenue
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12
At the end of the road, turn right onto West Main Street
1.7 mi · 4 min · West Main Street
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13
Continue on Huffine Lane
5.3 mi · 8 min · Huffine Lane
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14
Turn left onto Gallatin Road
33.9 mi · 41 min · Gallatin Road
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15
Turn right onto Lone Mountain Trail
7.1 mi · 11 min · Lone Mountain Trail
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16
Turn left onto Lone Moose Drive
61 m · 7 sec · Lone Moose Drive
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17
Keep slight right to continue on Access
156 m · 23 sec · Access
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18
Arrive at your destination
0 m · 1 sec · Access
Car Route Details
A richer read on the saved driving route between Miles City and Big Sky.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Main Street
Merge slight left
135 mi · 02h 19m
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 Miles City and Sunny near Big Sky.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Miles City to Big Sky?
The road trip is about 336.7 miles (541.9 km) and usually takes 05h 59m 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?
Laurel is a useful midpoint, sitting about 168 miles from Miles City and 168.7 miles from Big Sky.
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 59.6 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 5:02 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $46.25 one way or $92.50 round trip. Estimated CO2 is about 105.6 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Miles City and Sunny near Big Sky.
Stop Ideas Near Laurel
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Laurel.
Billings, MT
Flight Path Map
This map shows the direct air route between Miles City and Big Sky. Straight-line distance: 277.08 mi (445.91 km).
#1 Miles City
City in Custer County, Montana
| Population | 8,264 |
| Coordinates | 46.4083400, -105.8405600 |
| Altitude | 722 |
| Country | United States |
#2 Big Sky
Census designated place
| Population | 2,308 |
| Coordinates | 45.2846500, -111.3682900 |
| Altitude | 2200 |
| Country | United States |
End: Big Sky (-111.36829, 45.28465)
Estimated Travel Time
Distance: 542 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 13m |
| 40 mph (64.37 km/h) | 08h 25m |
| 50 mph (80.47 km/h) | 06h 44m |
| 60 mph (96.56 km/h) | 05h 36m |
| 70 mph (112.65 km/h) | 04h 48m |
| 80 mph (129 km/h) | 04h 12m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $46.25 | $92.50 |
| Mid-grade | $4.23 | $50.26 | $100.53 |
| Premium | $4.55 | $54.04 | $108.08 |
| Diesel | $5.41 | $64.29 | $128.59 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.