There are
1,162 mi
from Rapid City, SD to Ypsilanti, MI
That's the driving distance. It would take 20 hours 26 mins to go from Rapid City, South Dakota to Ypsilanti, Michigan.
The flight distance (direct flight from Rapid City, SD to Ypsilanti, MI) is 994.46 mi.
1,162 mi = 1,869.97 kms