There are
1,420 mi
from Gaithersburg, MD to Dickinson, TX
That's the driving distance. It would take 1 day 2 hours to go from Gaithersburg, Maryland to Dickinson, Texas.
The flight distance (direct flight from Gaithersburg, MD to Dickinson, TX) is 1,215.29 mi.
1,420 mi = 2,284.91 kms