There are
1,467 mi
from Gaithersburg, MD to Brenham, TX
That's the driving distance. It would take 1 day 3 hours to go from Gaithersburg, Maryland to Brenham, Texas.
The flight distance (direct flight from Gaithersburg, MD to Brenham, TX) is 1,251.18 mi.
1,467 mi = 2,361.56 kms