There are
1,038 mi
from Deerfield Beach, FL to Gaithersburg, MD
That's the driving distance. It would take 19 hours 2 mins to go from Deerfield Beach, Florida to Gaithersburg, Maryland.
The flight distance (direct flight from Deerfield Beach, FL to Gaithersburg, MD) is 901.84 mi.
1,038 mi = 1.61 kms