How far is Milbank, SD from Spearfish, SD?
The driving distance from Milbank, SD to Spearfish, SD is about 419.1 miles (674.4 km), with a travel time of about 07h 19m by car.
- The straight-line flight distance is about 357.2 miles (574.9 km).
- For a round trip, plan for roughly 14h 39m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM CDT.
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 19m.
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.
City in and county seat of Brule County, South Dakota, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Milbank and Spearfish.
Turn-by-Turn Driving Directions
Step-by-step road directions between Milbank and Spearfish.
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1
Start on East 4th Avenue
1333 ft · 27 sec · East 4th Avenue
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2
Turn left onto South Dakota Street
1.6 km · 1 min · South Dakota Street
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3
Continue on SD Highway 15
18.8 mi · 28 min · SD Highway 15
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4
Turn right onto US Highway 212
4.8 mi · 7 min · US Highway 212
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5
Turn left onto SD Highway 15
9.1 mi · 13 min · SD Highway 15
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6
Continue on 3rd Avenue North
1.1 mi · 2 min · 3rd Avenue North
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7
Continue on SD Highway 15
11.9 mi · 14 min · SD Highway 15
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8
Turn right onto SD Highway 28
4 mi · 6 min · SD Highway 28
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9
Take the ramp left
1569 ft · 38 sec
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10
Merge slight left
66.1 mi · 1 hr 2 min
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11
Take the exit slight right toward Interstate 90 West: Rapid City
2517 ft · 1 min
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12
Merge slight left
383.8 mi · 6 hr 6 min
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13
Take the exit slight right toward Jackson Boulevard, Black Hills State University
1541 ft · 43 sec
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14
Turn left onto East Jackson Boulevard
1 km · 2 min · East Jackson Boulevard
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15
Turn left onto North Main Street
45 m · 14 sec · North Main Street
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16
Arrive at your destination
0 m · 1 sec · North Main Street
Car Route Details
A richer read on the saved driving route between Milbank and Spearfish.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Interstate 90 West
Merge slight left
384 mi · 06h 06m
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.
Chance Showers And Thunderstorms leaving Milbank and Showers And Thunderstorms Likely near Spearfish.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Milbank to Spearfish?
The road trip is about 419.1 miles (674.4 km) and usually takes 07h 19m 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?
Chamberlain is a useful midpoint, sitting about 250.9 miles from Milbank and 168.2 miles from Spearfish.
How much longer is the road route than the straight-line distance?
The direct path is about 357.2 miles (574.9 km), while the road route adds roughly 61.9 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 CDT. 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 $55.77 one way or $111.55 round trip. Estimated CO2 is about 131.4 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Milbank and Spearfish, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Milbank and Showers And Thunderstorms Likely near Spearfish.
Flight Path Map
This map shows the direct air route between Milbank and Spearfish. Straight-line distance: 357.25 mi (574.94 km).
#1 Milbank
City in and county seat of Grand County, South Dakota, United States
| Population | 3,066 |
| Coordinates | 45.2191300, -96.6356200 |
| Altitude | 351 |
| Country | United States |
#2 Spearfish
City in Lawrence County, South Dakota, United States
| Population | 11,900 |
| Coordinates | 44.4908200, -103.8593700 |
| Altitude | 1112 |
| Country | United States |
End: North Main Street (-103.859247, 44.49086)
Estimated Travel Time
Distance: 674 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 57m |
| 40 mph (64.37 km/h) | 10h 28m |
| 50 mph (80.47 km/h) | 08h 22m |
| 60 mph (96.56 km/h) | 06h 59m |
| 70 mph (112.65 km/h) | 05h 59m |
| 80 mph (129 km/h) | 05h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $55.77 | $111.55 |
| Mid-grade | $4.25 | $62.90 | $125.80 |
| Premium | $4.65 | $68.83 | $137.67 |
| Diesel | $5.30 | $78.45 | $156.89 |
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 South Dakota · May 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.