There are
2,018 mi
from Simi Valley, CA to Darien, IL
That's the driving distance. It would take 1 day 11 hours to go from Simi Valley, California to Darien, Illinois.
The flight distance (direct flight from Simi Valley, CA to Darien, IL) is 1,744.25 mi.
2,018 mi = 3.22 kms