There are
2,618 mi
from Glendale, CA to Rockville, MD
That's the driving distance. It would take 1 day 22 hours to go from Glendale, California to Rockville, Maryland.
The flight distance (direct flight from Glendale, CA to Rockville, MD) is 2,285.33 mi.
2,618 mi = 4,213.78 kms