There are
1,424 mi
from Pearland, TX to Gaithersburg, MD
That's the driving distance. It would take 1 day 2 hours to go from Pearland, Texas to Gaithersburg, Maryland.
The flight distance (direct flight from Pearland, TX to Gaithersburg, MD) is 1,222.07 mi.
1,424 mi = 2,291.85 kms