There are
1,842 mi
from Huntington Beach, CA to St Charles, MO
That's the driving distance. It would take 1 day 8 hours to go from Huntington Beach, California to St Charles, Missouri.
The flight distance (direct flight from Huntington Beach, CA to St Charles, MO) is 1,566.15 mi.
1,842 mi = 1.61 kms