There are
1,920 mi
from Simi Valley, CA to Centralia, IL
That's the driving distance. It would take 1 day 10 hours to go from Simi Valley, California to Centralia, Illinois.
The flight distance (direct flight from Simi Valley, CA to Centralia, IL) is 1,667.39 mi.
1,920 mi = 1.61 kms