There are
833 mi
from Gaithersburg, MD to Waunakee, WI
That's the driving distance. It would take 15 hours 37 mins to go from Gaithersburg, Maryland to Waunakee, Wisconsin.
The flight distance (direct flight from Gaithersburg, MD to Waunakee, WI) is 695.17 mi.
833 mi = 1,340.07 kms