There are
1,046 mi
from Lexington, KY to Watertown, SD
That's the driving distance. It would take 18 hours 39 mins to go from Lexington, Kentucky to Watertown, South Dakota.
The flight distance (direct flight from Lexington, KY to Watertown, SD) is 805.24 mi.
1,046 mi = 1.61 kms