There are
1,431 mi
from Rapid City, SD to Los Altos, CA
That's the driving distance. It would take 1 day 1 hour to go from Rapid City, South Dakota to Los Altos, California.
The flight distance (direct flight from Rapid City, SD to Los Altos, CA) is 1,088.13 mi.
1,431 mi = 2,303.37 kms