There are
528 mi
from Gaithersburg, MD to Plattsburgh, NY
That's the driving distance. It would take 10 hours 33 mins to go from Gaithersburg, Maryland to Plattsburgh, New York.
The flight distance (direct flight from Gaithersburg, MD to Plattsburgh, NY) is 429.42 mi.
528 mi = 850.21 kms