There are
2,024 mi
from Simi Valley, CA to Lemont, IL
That's the driving distance. It would take 1 day 11 hours to go from Simi Valley, California to Lemont, Illinois.
The flight distance (direct flight from Simi Valley, CA to Lemont, IL) is 1,742.19 mi.
2,024 mi = 3.22 kms