There are
1,017 mi
from Sioux Falls, SD to Ashland, KY
That's the driving distance. It would take 18 hours 37 mins to go from Sioux Falls, South Dakota to Ashland, Kentucky.
The flight distance (direct flight from Sioux Falls, SD to Ashland, KY) is 811.15 mi.
1,017 mi = 1.61 kms