There are
1,467 mi
from Rapid City, SD to Lompoc, CA
That's the driving distance. It would take 1 day 2 hours to go from Rapid City, South Dakota to Lompoc, California.
The flight distance (direct flight from Rapid City, SD to Lompoc, CA) is 1,124.33 mi.
1,467 mi = 2,361.09 kms