There are
416 mi
from Gaithersburg, MD to Cornelius, NC
That's the driving distance. It would take 7 hours 51 mins to go from Gaithersburg, Maryland to Cornelius, North Carolina.
The flight distance (direct flight from Gaithersburg, MD to Cornelius, NC) is 322.81 mi.
416 mi = 669.87 kms