There are
2,031 mi
from Simi Valley, CA to Markham, IL
That's the driving distance. It would take 1 day 11 hours to go from Simi Valley, California to Markham, Illinois.
The flight distance (direct flight from Simi Valley, CA to Markham, IL) is 1,757.28 mi.
2,031 mi = 3.22 kms