There are
495 mi
from Gaithersburg, MD to Dearborn Heights, MI
That's the driving distance. It would take 9 hours 18 mins to go from Gaithersburg, Maryland to Dearborn Heights, Michigan.
The flight distance (direct flight from Gaithersburg, MD to Dearborn Heights, MI) is 386.79 mi.
495 mi = 796.20 kms