There are
2,619 mi
from Gaithersburg, MD to San Fernando, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to San Fernando, California.
The flight distance (direct flight from Gaithersburg, MD to San Fernando, CA) is 2,288.83 mi.
2,619 mi = 4,215.60 kms