There are
2,503 mi
from Middletown, OH to Eureka, CA
That's the driving distance. It would take 1 day 20 hours to go from Middletown, Ohio to Eureka, California.
The flight distance (direct flight from Middletown, OH to Eureka, CA) is 2,083.62 mi.
2,503 mi = 4,028.61 kms