There are
1,687 mi
from Simi Valley, CA to Sioux Falls, SD
That's the driving distance. It would take 1 day 5 hours to go from Simi Valley, California to Sioux Falls, South Dakota.
The flight distance (direct flight from Simi Valley, CA to Sioux Falls, SD) is 1,343.29 mi.
1,687 mi = 1.61 kms