There are
746 mi
from Gaithersburg, MD to Caledonia, WI
That's the driving distance. It would take 13 hours 57 mins to go from Gaithersburg, Maryland to Caledonia, Wisconsin.
The flight distance (direct flight from Gaithersburg, MD to Caledonia, WI) is 613.38 mi.
746 mi = 1,200.18 kms