There are
2,046 mi
from Simi Valley, CA to Mundelein, IL
That's the driving distance. It would take 1 day 12 hours to go from Simi Valley, California to Mundelein, Illinois.
The flight distance (direct flight from Simi Valley, CA to Mundelein, IL) is 1,747.43 mi.
2,046 mi = 3.22 kms