There are
2,919 mi
from Rockville, MD to Eureka, CA
That's the driving distance. It would take 2 days 3 hours to go from Rockville, Maryland to Eureka, California.
The flight distance (direct flight from Rockville, MD to Eureka, CA) is 2,463.02 mi.
2,919 mi = 4,697.78 kms