There are
1,821 mi
from Simi Valley, CA to Mason City, IA
That's the driving distance. It would take 1 day 8 hours to go from Simi Valley, California to Mason City, Iowa.
The flight distance (direct flight from Simi Valley, CA to Mason City, IA) is 1,501.70 mi.
1,821 mi = 1.61 kms