There are
1,836 mi
from San Clemente, CA to Arnold, MO
That's the driving distance. It would take 1 day 8 hours to go from San Clemente, California to Arnold, Missouri.
The flight distance (direct flight from San Clemente, CA to Arnold, MO) is 1,556.35 mi.
1,836 mi = 2,954.84 kms