There are
1,640 mi
from Simi Valley, CA to Maryville, MO
That's the driving distance. It would take 1 day 5 hours to go from Simi Valley, California to Maryville, Missouri.
The flight distance (direct flight from Simi Valley, CA to Maryville, MO) is 1,374.39 mi.
1,640 mi = 1.61 kms