There are
1,440 mi
from Knoxville, TN to Rapid City, SD
That's the driving distance. It would take 1 day 1 hour to go from Knoxville, Tennessee to Rapid City, South Dakota.
The flight distance (direct flight from Knoxville, TN to Rapid City, SD) is 1,161.55 mi.
1,440 mi = 1.61 kms