Miles between Sioux Falls, SD and Alton, IL

There are
620 mi
from Sioux Falls, SD to Alton, IL

That's the driving distance. It would take 11 hours 24 mins to go from Sioux Falls, South Dakota to Alton, Illinois.

The flight distance (direct flight from Sioux Falls, SD to Alton, IL) is 466.97 mi.

620 mi = 998.10 kms