There are
2,827 mi
from Gaithersburg, MD to Cupertino, CA
That's the driving distance. It would take 2 days 1 hour to go from Gaithersburg, Maryland to Cupertino, California.
The flight distance (direct flight from Gaithersburg, MD to Cupertino, CA) is 2,411.44 mi.
2,827 mi = 4,549.35 kms