There are
2,284 mi
from Simi Valley, CA to Circleville, OH
That's the driving distance. It would take 1 day 16 hours to go from Simi Valley, California to Circleville, Ohio.
The flight distance (direct flight from Simi Valley, CA to Circleville, OH) is 1,999.44 mi.
2,284 mi = 3,675.36 kms