There are
1,949 mi
from Simi Valley, CA to Effingham, IL
That's the driving distance. It would take 1 day 10 hours to go from Simi Valley, California to Effingham, Illinois.
The flight distance (direct flight from Simi Valley, CA to Effingham, IL) is 1,700.16 mi.
1,949 mi = 1.61 kms