How far is Spearfish, SD from Tyndall, SD?
The driving distance from Spearfish, SD to Tyndall, SD is about 374.9 miles (603.4 km), with a travel time of about 06h 31m by car.
- The straight-line flight distance is about 316.6 miles (509.5 km).
- For a round trip, plan for roughly 13h 02m 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 31m.
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 South Dakota, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Spearfish and Tyndall.
Turn-by-Turn Driving Directions
Step-by-step road directions between Spearfish and Tyndall.
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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
274.2 mi · 4 hr 19 min
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9
Take the exit slight right toward Mitchell
1578 ft · 39 sec
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10
Keep slight right
58 m · 5 sec
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11
Turn slight right onto South Burr Street
1402 ft · 26 sec · South Burr Street
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12
Continue on South Highway 37
1 mi · 2 min · South Highway 37
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13
Continue on SD Highway 37
47.1 mi · 1 hr 10 min · SD Highway 37
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14
Turn left onto SD Highway 50
3.7 mi · 6 min · SD Highway 50
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15
Turn left onto 303rd Street
1.3 mi · 3 min · 303rd Street
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16
Continue on West 20th Avenue
2632 ft · 1 min · West 20th Avenue
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17
Turn right onto Main Street
914 ft · 27 sec · Main Street
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18
Turn right onto West 18th Avenue
15 m · 2 sec · West 18th Avenue
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19
Arrive at your destination
0 m · 1 sec · West 18th Avenue
Car Route Details
A richer read on the saved driving route between Spearfish and Tyndall.
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
274 mi · 04h 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.
Partly Sunny then Slight Chance Showers And Thunderstorms leaving Spearfish and Mostly Sunny near Tyndall.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Spearfish to Tyndall?
The road trip is about 374.9 miles (603.4 km) and usually takes 06h 31m 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?
Draper is a useful midpoint, sitting about 187.1 miles from Spearfish and 187.8 miles from Tyndall.
How much longer is the road route than the straight-line distance?
The direct path is about 316.6 miles (509.5 km), while the road route adds roughly 58.3 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 $49.89 one way or $99.78 round trip. Estimated CO2 is about 117.6 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Spearfish and Tyndall, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Showers And Thunderstorms around Spearfish and Mostly Sunny near Tyndall.
Flight Path Map
This map shows the direct air route between Spearfish and Tyndall. Straight-line distance: 316.61 mi (509.54 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 Tyndall
City in and county seat of Bon Homme County, South Dakota, United States
| Population | 1,015 |
| Coordinates | 42.9933300, -97.8628500 |
| Altitude | 433 |
| Country | United States |
End: Tyndall (-97.86285, 42.99333)
Estimated Travel Time
Distance: 603 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 29m |
| 40 mph (64.37 km/h) | 09h 22m |
| 50 mph (80.47 km/h) | 07h 29m |
| 60 mph (96.56 km/h) | 06h 14m |
| 70 mph (112.65 km/h) | 05h 21m |
| 80 mph (129 km/h) | 04h 40m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $49.89 | $99.78 |
| Mid-grade | $4.25 | $56.27 | $112.53 |
| Premium | $4.65 | $61.57 | $123.14 |
| Diesel | $5.30 | $70.17 | $140.34 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.