There are
1,595 mi
from San Clemente, CA to Vermillion, SD
That's the driving distance. It would take 1 day 4 hours to go from San Clemente, California to Vermillion, South Dakota.
The flight distance (direct flight from San Clemente, CA to Vermillion, SD) is 1,291.83 mi.
1,595 mi = 2,567.01 kms