There are
948 mi
from Gaithersburg, MD to Seminole, FL
That's the driving distance. It would take 17 hours 49 mins to go from Gaithersburg, Maryland to Seminole, Florida.
The flight distance (direct flight from Gaithersburg, MD to Seminole, FL) is 844.34 mi.
948 mi = 1,525.99 kms