Miles between Decatur, IL and Watertown, SD

There are
733 mi
from Decatur, IL to Watertown, SD

That's the driving distance. It would take 13 hours 4 mins to go from Decatur, Illinois to Watertown, South Dakota.

The flight distance (direct flight from Decatur, IL to Watertown, SD) is 543.30 mi.

733 mi = 1,179.12 kms