There are
963 mi
from Rapid City, SD to Bourbonnais, IL
That's the driving distance. It would take 16 hours 40 mins to go from Rapid City, South Dakota to Bourbonnais, Illinois.
The flight distance (direct flight from Rapid City, SD to Bourbonnais, IL) is 804.38 mi.
963 mi = 1,549.57 kms