There are
1,057 mi
from Rapid City, SD to Frankfort, IN
That's the driving distance. It would take 18 hours 33 mins to go from Rapid City, South Dakota to Frankfort, Indiana.
The flight distance (direct flight from Rapid City, SD to Frankfort, IN) is 893.63 mi.
1,057 mi = 1,701.12 kms