There are
2,623 mi
from Long Beach, CA to Gaithersburg, MD
That's the driving distance. It would take 1 day 22 hours to go from Long Beach, California to Gaithersburg, Maryland.
The flight distance (direct flight from Long Beach, CA to Gaithersburg, MD) is 2,288.59 mi.
2,623 mi = 3.22 kms