Miles between Gary, IN and Watertown, SD

There are
639 mi
from Gary, IN to Watertown, SD

That's the driving distance. It would take 12 hours 46 mins to go from Gary, Indiana to Watertown, South Dakota.

The flight distance (direct flight from Gary, IN to Watertown, SD) is 541.64 mi.

639 mi = 1,027.77 kms