There are
2,635 mi
from Gaithersburg, MD to Hermosa Beach, CA
That's the driving distance. It would take 1 day 23 hours to go from Gaithersburg, Maryland to Hermosa Beach, California.
The flight distance (direct flight from Gaithersburg, MD to Hermosa Beach, CA) is 2,297.13 mi.
2,635 mi = 4,241.27 kms