There are
2,583 mi
from Westerville, OH to Eureka, CA
That's the driving distance. It would take 1 day 21 hours to go from Westerville, Ohio to Eureka, California.
The flight distance (direct flight from Westerville, OH to Eureka, CA) is 2,147.82 mi.
2,583 mi = 4,156.93 kms