Miles between Boulder, CO and Watertown, SD

There are
741 mi
from Boulder, CO to Watertown, SD

That's the driving distance. It would take 13 hours 28 mins to go from Boulder, Colorado to Watertown, South Dakota.

The flight distance (direct flight from Boulder, CO to Watertown, SD) is 535.02 mi.

741 mi = 1,191.75 kms