There are
2,787 mi
from Gaithersburg, MD to Larkspur, CA
That's the driving distance. It would take 2 days to go from Gaithersburg, Maryland to Larkspur, California.
The flight distance (direct flight from Gaithersburg, MD to Larkspur, CA) is 2,425.61 mi.
2,787 mi = 4,484.46 kms