There are
2,440 mi
from Westerville, OH to Concord, CA
That's the driving distance. It would take 1 day 18 hours to go from Westerville, Ohio to Concord, California.
The flight distance (direct flight from Westerville, OH to Concord, CA) is 2,086.39 mi.
2,440 mi = 3,927.00 kms