There are
1,592 mi
from Waltham, MA to Watertown, SD
That's the driving distance. It would take 1 day 6 hours to go from Waltham, Massachusetts to Watertown, South Dakota.
The flight distance (direct flight from Waltham, MA to Watertown, SD) is 1,300.13 mi.
1,592 mi = 2,562.87 kms