How far is Miles City, MT from Dillon, MT?
The driving distance from Miles City, MT to Dillon, MT is about 400.6 miles (644.7 km), with a travel time of about 07h 12m by car.
- The straight-line flight distance is about 337.4 miles (543 km).
- For a round trip, plan for roughly 14h 25m 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 12m.
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 in Stillwater County, Montana, 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 Dillon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Miles City and Dillon.
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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
83.5 mi · 1 hr 23 min
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10
Take the exit slight right toward MT 55: Whitehall
1408 ft · 42 sec
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11
Turn left onto Whitetail Road
69 m · 4 sec · Whitetail Road
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12
Continue on North Whitehall Street
2991 ft · 53 sec · North Whitehall Street
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13
At the end of the road, turn right onto West Legion Avenue
2124 ft · 40 sec · West Legion Avenue
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14
Turn left onto State Highway 55
9.6 mi · 14 min · State Highway 55
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15
Turn straight onto State Highway 55
1620 ft · 27 sec · State Highway 55
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16
Continue on Montana Highway 55
2.1 mi · 3 min · Montana Highway 55
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17
Continue on Montana Highway 41
14.4 mi · 21 min · Montana Highway 41
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18
Turn right onto West 4th Avenue
27.2 mi · 40 min · West 4th Avenue
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19
Continue on Montana Street
1.2 km · 1 min · Montana Street
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20
Turn left onto East Helena Street
108 m · 15 sec · East Helena Street
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21
Turn right onto North Idaho Street
982 ft · 43 sec · North Idaho Street
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22
Arrive at your destination
0 m · 1 sec · South Idaho Street
Car Route Details
A richer read on the saved driving route between Miles City and Dillon.
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.
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 Dillon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Miles City to Dillon?
The road trip is about 400.6 miles (644.7 km) and usually takes 07h 12m 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?
Columbus is a useful midpoint, sitting about 200 miles from Miles City and 200.7 miles from Dillon.
How much longer is the road route than the straight-line distance?
The direct path is about 337.4 miles (543 km), while the road route adds roughly 63.2 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 $55.05 one way or $110.09 round trip. Estimated CO2 is about 125.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Miles City and Sunny near Dillon.
Stop Ideas Near Columbus
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 Columbus.
Billings, MT
Livingston, MT
Flight Path Map
This map shows the direct air route between Miles City and Dillon. Straight-line distance: 337.42 mi (543.02 km).
#1 Miles City
City in Custer County, Montana
| Population | 8,264 |
| Coordinates | 46.4083400, -105.8405600 |
| Altitude | 722 |
| Country | United States |
#2 Dillon
City in Montana, United States
| Population | 4,333 |
| Coordinates | 45.2163100, -112.6375200 |
| Altitude | 1555 |
| Country | United States |
End: Dillon (-112.63752, 45.21631)
Estimated Travel Time
Distance: 645 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 20m |
| 40 mph (64.37 km/h) | 10h 00m |
| 50 mph (80.47 km/h) | 08h 00m |
| 60 mph (96.56 km/h) | 06h 40m |
| 70 mph (112.65 km/h) | 05h 43m |
| 80 mph (129 km/h) | 04h 59m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $55.05 | $110.09 |
| Mid-grade | $4.23 | $59.83 | $119.65 |
| Premium | $4.55 | $64.32 | $128.65 |
| Diesel | $5.41 | $76.53 | $153.05 |
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 · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.