There are
2,030 mi
from Champaign, IL to Simi Valley, CA
That's the driving distance. It would take 1 day 11 hours to go from Champaign, Illinois to Simi Valley, California.
The flight distance (direct flight from Champaign, IL to Simi Valley, CA) is 1,719.53 mi.
2,030 mi = 3.22 kms