There are
1,655 mi
from Oceanside, CA to Maryville, MO
That's the driving distance. It would take 1 day 5 hours to go from Oceanside, California to Maryville, Missouri.
The flight distance (direct flight from Oceanside, CA to Maryville, MO) is 1,335.33 mi.
1,655 mi = 2,662.65 kms