There are
1,422 mi
from Rapid City, SD to Oak Ridge, TN
That's the driving distance. It would take 1 day 1 hour to go from Rapid City, South Dakota to Oak Ridge, Tennessee.
The flight distance (direct flight from Rapid City, SD to Oak Ridge, TN) is 1,143.58 mi.
1,422 mi = 2,288.27 kms