There are
1,516 mi
from Gaithersburg, MD to Leander, TX
That's the driving distance. It would take 1 day 3 hours to go from Gaithersburg, Maryland to Leander, Texas.
The flight distance (direct flight from Gaithersburg, MD to Leander, TX) is 1,307.61 mi.
1,516 mi = 2,439.97 kms