There are
1,557 mi
from Gresham, OR to Yankton, SD
That's the driving distance. It would take 1 day 3 hours to go from Gresham, Oregon to Yankton, South Dakota.
The flight distance (direct flight from Gresham, OR to Yankton, SD) is 1,248.30 mi.
1,557 mi = 1.61 kms