There are
1,400 mi
from Stamford, CT to Yankton, SD
That's the driving distance. It would take 1 day 1 hour to go from Stamford, Connecticut to Yankton, South Dakota.
The flight distance (direct flight from Stamford, CT to Yankton, SD) is 1,228.05 mi.
1,400 mi = 1.61 kms