There are
1,947 mi
from Simi Valley, CA to Herrin, IL
That's the driving distance. It would take 1 day 10 hours to go from Simi Valley, California to Herrin, Illinois.
The flight distance (direct flight from Simi Valley, CA to Herrin, IL) is 1,673.03 mi.
1,947 mi = 1.61 kms