There are
1,451 mi
from Gaithersburg, MD to Rosenberg, TX
That's the driving distance. It would take 1 day 2 hours to go from Gaithersburg, Maryland to Rosenberg, Texas.
The flight distance (direct flight from Gaithersburg, MD to Rosenberg, TX) is 1,247.32 mi.
1,451 mi = 2,335.33 kms