Miles between Normal, IL and Watertown, SD

There are
685 mi
from Normal, IL to Watertown, SD

That's the driving distance. It would take 12 hours 6 mins to go from Normal, Illinois to Watertown, South Dakota.

The flight distance (direct flight from Normal, IL to Watertown, SD) is 511.40 mi.

685 mi = 1,102.53 kms