There are
2,618 mi
from Glendale, CA to Gaithersburg, MD
That's the driving distance. It would take 1 day 23 hours to go from Glendale, California to Gaithersburg, Maryland.
The flight distance (direct flight from Glendale, CA to Gaithersburg, MD) is 2,282.42 mi.
2,618 mi = 3.22 kms