There are
1,042 mi
from Conroe, TX to Sioux Falls, SD
That's the driving distance. It would take 18 hours 21 mins to go from Conroe, Texas to Sioux Falls, South Dakota.
The flight distance (direct flight from Conroe, TX to Sioux Falls, SD) is 917.21 mi.
1,042 mi = 1,677.25 kms