There are
2,615 mi
from Montebello, CA to Rockville, MD
That's the driving distance. It would take 1 day 22 hours to go from Montebello, California to Rockville, Maryland.
The flight distance (direct flight from Montebello, CA to Rockville, MD) is 2,280.89 mi.
2,615 mi = 4,208.39 kms