There are
1,827 mi
from Fountain Valley, CA to Festus, MO
That's the driving distance. It would take 1 day 7 hours to go from Fountain Valley, California to Festus, Missouri.
The flight distance (direct flight from Fountain Valley, CA to Festus, MO) is 1,566.21 mi.
1,827 mi = 2,940.97 kms