How far is Fort Thompson, SD from Sioux Falls, SD?
The driving distance from Fort Thompson, SD to Sioux Falls, SD is about 164 miles (264 km), with a travel time of about 02h 29m by car.
- The straight-line flight distance is about 141.1 miles (227.1 km).
- For a round trip, plan for roughly 04h 59m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 29m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 South Dakota, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Partly Sunny then Slight Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Fort Thompson and Sioux Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Thompson and Sioux Falls.
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1
Start on BIA Route 4
20 m · 2 sec · BIA Route 4
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2
Turn right onto SD Highway 249
1.1 mi · 2 min · SD Highway 249
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3
Turn straight onto SD Highway 34
4.6 mi · 7 min · SD Highway 34
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4
Turn right onto SD Highway 50
18.8 mi · 28 min · SD Highway 50
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5
Continue on North Main Street
1.5 km · 2 min · North Main Street
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6
Turn left onto East Mott Avenue
101 m · 17 sec · East Mott Avenue
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7
Turn right onto North Sanborn Street
1625 ft · 1 min · North Sanborn Street
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8
Turn left onto East King Street
3.2 mi · 5 min · East King Street
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9
Take the ramp left toward I 90 East
1848 ft · 45 sec
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10
Merge slight left
133.9 mi · 2 hr 7 min
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11
Take the exit slight right toward I 229 South
2551 ft · 33 sec
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12
Merge slight left
3.6 mi · 4 min
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13
Take the exit slight right toward 10th Street, Downtown
1309 ft · 32 sec
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14
Keep slight right to continue on SD 42: Downtown, Washington Pavilion
610 ft · 21 sec
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15
Turn right onto South Lowell Avenue
633 ft · 23 sec · South Lowell Avenue
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16
Turn left onto East 8th Street
992 ft · 29 sec · East 8th Street
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17
Turn right onto North Chicago Avenue
540 ft · 24 sec · North Chicago Avenue
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18
Arrive at your destination
0 m · 1 sec · North Chicago Avenue
Car Route Details
A richer read on the saved driving route between Fort Thompson and Sioux Falls.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 90 East
Merge slight left
134 mi · 02h 07m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Fort Thompson and Partly Sunny then Slight Chance Rain Showers near Sioux Falls.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fort Thompson to Sioux Falls?
The road trip is about 164 miles (264 km) and usually takes 02h 29m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Mount Vernon is a useful midpoint, sitting about 83.9 miles from Fort Thompson and 80.1 miles from Sioux Falls.
How much longer is the road route than the straight-line distance?
The direct path is about 141.1 miles (227.1 km), while the road route adds roughly 22.9 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 1:30 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.83 one way or $43.67 round trip. Estimated CO2 is about 51.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Fort Thompson and Partly Sunny then Slight Chance Rain Showers near Sioux Falls.
Flight Path Map
This map shows the direct air route between Fort Thompson and Sioux Falls. Straight-line distance: 141.11 mi (227.1 km).
#1 Fort Thompson
Census-designated place in Buffalo County, South Dakota, United States
| Population | 1,282 |
| Coordinates | 44.0686000, -99.4378800 |
| Altitude | 439 |
| Country | United States |
#2 Sioux Falls
The largest city in South Dakota.
| Population | 157,584 |
| Coordinates | 43.5499700, -96.7003300 |
| Altitude | 448 |
| Country | United States |
End: North Chicago Avenue (-96.700171, 43.549971)
Estimated Travel Time
Distance: 264 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 27m |
| 40 mph (64.37 km/h) | 04h 06m |
| 50 mph (80.47 km/h) | 03h 16m |
| 60 mph (96.56 km/h) | 02h 44m |
| 70 mph (112.65 km/h) | 02h 20m |
| 80 mph (129 km/h) | 02h 02m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $21.83 | $43.67 |
| Mid-grade | $4.25 | $24.62 | $49.25 |
| Premium | $4.65 | $26.95 | $53.89 |
| Diesel | $5.30 | $30.71 | $61.42 |
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.