There are
2,587 mi
from Gaithersburg, MD to Calexico, CA
That's the driving distance. It would take 1 day 21 hours to go from Gaithersburg, Maryland to Calexico, California.
The flight distance (direct flight from Gaithersburg, MD to Calexico, CA) is 2,172.50 mi.
2,587 mi = 4,162.82 kms