There are
2,825 mi
from Gaithersburg, MD to Los Altos, CA
That's the driving distance. It would take 2 days 1 hour to go from Gaithersburg, Maryland to Los Altos, California.
The flight distance (direct flight from Gaithersburg, MD to Los Altos, CA) is 2,414.48 mi.
2,825 mi = 4,547.09 kms