There are
1,845 mi
from San Clemente, CA to Troy, MO
That's the driving distance. It would take 1 day 8 hours to go from San Clemente, California to Troy, Missouri.
The flight distance (direct flight from San Clemente, CA to Troy, MO) is 1,527.49 mi.
1,845 mi = 2,968.78 kms