There are
2,676 mi
from Oxnard, CA to Rockville, MD
That's the driving distance. It would take 1 day 23 hours to go from Oxnard, California to Rockville, Maryland.
The flight distance (direct flight from Oxnard, CA to Rockville, MD) is 2,333.26 mi.
2,676 mi = 4,305.93 kms