How far is Spearfish, SD from Milbank, SD?
The driving distance from Spearfish, SD to Milbank, SD is about 502.8 miles (809.1 km), with a travel time of about 08h 24m by car.
- The straight-line flight distance is about 357.2 miles (574.9 km).
- For a round trip, plan for roughly 16h 48m 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 08h 24m.
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.
Mostly Clear
Sunny
Driving Route Map
The map below follows the saved road route between Spearfish and Milbank.
Turn-by-Turn Driving Directions
Step-by-step road directions between Spearfish and Milbank.
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1
Start on North Main Street
26 m · 30 sec · North Main Street
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2
Continue on North Main Street
51 m · 10 sec · North Main Street
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3
Turn right onto East Jackson Boulevard
2777 ft · 2 min · East Jackson Boulevard
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4
Take the ramp right toward I 90 East, US 85 South
1555 ft · 38 sec
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5
Merge slight left
14.2 mi · 14 min
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6
Continue straight
7.6 mi · 8 min
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7
Continue straight
23.6 mi · 24 min
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8
Continue straight
338.8 mi · 5 hr 20 min
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9
Take the exit slight right toward I 29: Fargo
1129 ft · 28 sec
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10
Merge slight left
66.5 mi · 1 hr 2 min
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11
Take the exit slight right toward North SD 15, SD 28: Toronto, Estelline
1344 ft · 33 sec
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12
Turn right onto SD Highway 28
3.9 mi · 6 min · SD Highway 28
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13
Turn left onto SD Highway 15
11.9 mi · 14 min · SD Highway 15
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14
Continue on 3rd Avenue South
1.1 mi · 2 min · 3rd Avenue South
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15
Continue on SD Highway 15
9.1 mi · 14 min · SD Highway 15
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16
At the end of the road, turn right onto US Highway 212
4.8 mi · 7 min · US Highway 212
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17
Turn left onto SD Highway 15
18.8 mi · 28 min · SD Highway 15
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18
Continue on South Dakota Street
1.6 km · 2 min · South Dakota Street
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19
Turn right onto West 4th Avenue
1333 ft · 19 sec · West 4th Avenue
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20
Arrive at your destination
0 m · 1 sec · East 4th Avenue
Car Route Details
A richer read on the saved driving route between Spearfish and Milbank.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 90 East
Continue straight
339 mi · 05h 20m
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.
Mostly Clear leaving Spearfish and Sunny near Milbank.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Spearfish to Milbank?
The road trip is about 502.8 miles (809.1 km) and usually takes 08h 24m 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 251 miles from Spearfish and 251.8 miles from Milbank.
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 145.6 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 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 $66.90 one way or $133.80 round trip. Estimated CO2 is about 157.7 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Spearfish and Milbank, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Clear around Spearfish and Sunny near Milbank.
Flight Path Map
This map shows the direct air route between Spearfish and Milbank. Straight-line distance: 357.25 mi (574.94 km).
#1 Spearfish
City in Lawrence County, South Dakota, United States
| Population | 11,900 |
| Coordinates | 44.4908200, -103.8593700 |
| Altitude | 1112 |
| Country | United States |
#2 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 |
End: Milbank (-96.63562, 45.21913)
Estimated Travel Time
Distance: 809 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 16h 45m |
| 40 mph (64.37 km/h) | 12h 34m |
| 50 mph (80.47 km/h) | 10h 03m |
| 60 mph (96.56 km/h) | 08h 22m |
| 70 mph (112.65 km/h) | 07h 10m |
| 80 mph (129 km/h) | 06h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $66.90 | $133.80 |
| Mid-grade | $4.25 | $75.45 | $150.90 |
| Premium | $4.65 | $82.56 | $165.12 |
| Diesel | $5.30 | $94.09 | $188.19 |
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 · Apr 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.