There are
2,005 mi
from Elgin, IL to Simi Valley, CA
That's the driving distance. It would take 1 day 11 hours to go from Elgin, Illinois to Simi Valley, California.
The flight distance (direct flight from Elgin, IL to Simi Valley, CA) is 1,731.18 mi.
2,005 mi = 3.22 kms