There are
286 mi
from Gaithersburg, MD to Patchogue, NY
That's the driving distance. It would take 6 hours 3 mins to go from Gaithersburg, Maryland to Patchogue, New York.
The flight distance (direct flight from Gaithersburg, MD to Patchogue, NY) is 248.41 mi.
286 mi = 461.04 kms