There are
1,753 mi
from Simi Valley, CA to Marshalltown, IA
That's the driving distance. It would take 1 day 6 hours to go from Simi Valley, California to Marshalltown, Iowa.
The flight distance (direct flight from Simi Valley, CA to Marshalltown, IA) is 1,497.70 mi.
1,753 mi = 1.61 kms