There are
652 mi
from Gaithersburg, MD to Griffith, IN
That's the driving distance. It would take 12 hours 5 mins to go from Gaithersburg, Maryland to Griffith, Indiana.
The flight distance (direct flight from Gaithersburg, MD to Griffith, IN) is 562.63 mi.
652 mi = 1,049.40 kms