There are
1,762 mi
from Gaithersburg, MD to Pharr, TX
That's the driving distance. It would take 1 day 8 hours to go from Gaithersburg, Maryland to Pharr, Texas.
The flight distance (direct flight from Gaithersburg, MD to Pharr, TX) is 1,506.87 mi.
1,762 mi = 2,835.72 kms