How far is Sioux Falls, SD from Custer, SD?
The driving distance from Sioux Falls, SD to Custer, SD is about 389.1 miles (626.2 km), with a travel time of about 06h 30m by car.
- The straight-line flight distance is about 345 miles (555.3 km).
- For a round trip, plan for roughly 13h 00m 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 06h 30m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Census-designated place in Lyman County, South Dakota, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers
Rain And Snow Likely
Driving Route Map
The map below follows the saved road route between Sioux Falls and Custer.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sioux Falls and Custer.
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1
Start on North Chicago Avenue
540 ft · 29 sec · North Chicago Avenue
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2
At the end of the road, turn left onto East 8th Street
992 ft · 29 sec · East 8th Street
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3
Turn right onto North Lowell Avenue
633 ft · 19 sec · North Lowell Avenue
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4
Turn left onto East 10th Street
549 ft · 25 sec · East 10th Street
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5
Take the ramp slight left
4.2 mi · 5 min
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6
Take the exit straight toward I 90
1343 ft · 46 sec
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7
Merge slight left
338.5 mi · 5 hr 20 min
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8
Take the exit slight right toward US 16 Truck, ND 79 South: Mount Rushmore, Crazy Horse
1470 ft · 36 sec
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9
Keep slight left
869 ft · 23 sec
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10
Continue on North Elk Vale Road
5.4 mi · 7 min · North Elk Vale Road
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11
Continue on East Catron Boulevard
1.2 mi · 2 min · East Catron Boulevard
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12
Continue on Catron Boulevard
2.2 mi · 3 min · Catron Boulevard
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13
Turn left onto Mount Rushmore Road
1.1 mi · 1 min · Mount Rushmore Road
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14
Continue on South Highway 16
17.5 mi · 22 min · South Highway 16
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15
Continue on Highway 385
3 mi · 5 min · Highway 385
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16
Continue on East Main Street
1.4 mi · 3 min · East Main Street
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17
Continue on Highway 385
6.1 mi · 8 min · Highway 385
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18
Continue on US Highway 16/385
6 mi · 8 min · US Highway 16/385
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19
Continue on North 5th Street
1.1 mi · 3 min · North 5th Street
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20
Turn left onto Mount Rushmore Road
128 m · 10 sec · Mount Rushmore Road
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21
Arrive at your destination
0 m · 1 sec · Mount Rushmore Road
Car Route Details
A richer read on the saved driving route between Sioux Falls and Custer.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 90
Merge slight left
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.
Chance Rain Showers leaving Sioux Falls and Rain And Snow Likely near Custer.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sioux Falls to Custer?
The road trip is about 389.1 miles (626.2 km) and usually takes 06h 30m 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?
Vivian is a useful midpoint, sitting about 194.1 miles from Sioux Falls and 195 miles from Custer.
How much longer is the road route than the straight-line distance?
The direct path is about 345 miles (555.3 km), while the road route adds roughly 44.1 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 $51.78 one way or $103.55 round trip. Estimated CO2 is about 122 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Sioux Falls and Custer, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Chance Rain Showers around Sioux Falls and Rain And Snow Likely near Custer.
Flight Path Map
This map shows the direct air route between Sioux Falls and Custer. Straight-line distance: 345.06 mi (555.32 km).
#1 Sioux Falls
The largest city in South Dakota.
| Population | 157,584 |
| Coordinates | 43.5499700, -96.7003300 |
| Altitude | 448 |
| Country | United States |
#2 Custer
City in and county seat of Custer County, South Dakota, United States
| Population | 1,926 |
| Coordinates | 43.7666500, -103.5988100 |
| Altitude | 1620 |
| Country | United States |
End: Custer (-103.59881, 43.76665)
Estimated Travel Time
Distance: 626 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 57m |
| 40 mph (64.37 km/h) | 09h 43m |
| 50 mph (80.47 km/h) | 07h 46m |
| 60 mph (96.56 km/h) | 06h 29m |
| 70 mph (112.65 km/h) | 05h 33m |
| 80 mph (129 km/h) | 04h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $51.78 | $103.55 |
| Mid-grade | $4.25 | $58.39 | $116.79 |
| Premium | $4.65 | $63.90 | $127.80 |
| Diesel | $5.30 | $72.82 | $145.65 |
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.