There are
2,280 mi
from Simi Valley, CA to Westerville, OH
That's the driving distance. It would take 1 day 16 hours to go from Simi Valley, California to Westerville, Ohio.
The flight distance (direct flight from Simi Valley, CA to Westerville, OH) is 2,000.12 mi.
2,280 mi = 3.22 kms