There are
2,789 mi
from Gaithersburg, MD to Alameda, CA
That's the driving distance. It would take 2 days to go from Gaithersburg, Maryland to Alameda, California.
The flight distance (direct flight from Gaithersburg, MD to Alameda, CA) is 2,413.60 mi.
2,789 mi = 4,488.40 kms