There are
1,585 mi
from Rapid City, SD to Ithaca, NY
That's the driving distance. It would take 1 day 4 hours to go from Rapid City, South Dakota to Ithaca, New York.
The flight distance (direct flight from Rapid City, SD to Ithaca, NY) is 1,343.70 mi.
1,585 mi = 2,550.14 kms