There are
1,828 mi
from San Clemente, CA to Chesterfield, MO
That's the driving distance. It would take 1 day 7 hours to go from San Clemente, California to Chesterfield, Missouri.
The flight distance (direct flight from San Clemente, CA to Chesterfield, MO) is 1,546.94 mi.
1,828 mi = 2,942.37 kms