There are
936 mi
from Sioux Falls, SD to Lufkin, TX
That's the driving distance. It would take 17 hours 52 mins to go from Sioux Falls, South Dakota to Lufkin, Texas.
The flight distance (direct flight from Sioux Falls, SD to Lufkin, TX) is 850.58 mi.
936 mi = 1,506.41 kms