Miles between Rapid City, SD and Longmont, CO

There are
383 mi
from Rapid City, SD to Longmont, CO

That's the driving distance. It would take 6 hours 50 mins to go from Rapid City, South Dakota to Longmont, Colorado.

The flight distance (direct flight from Rapid City, SD to Longmont, CO) is 286.86 mi.

383 mi = 616.81 kms