There are
2,228 mi
from Mesa, AZ to Gaithersburg, MD
That's the driving distance. It would take 1 day 16 hours to go from Mesa, Arizona to Gaithersburg, Maryland.
The flight distance (direct flight from Mesa, AZ to Gaithersburg, MD) is 1,956.65 mi.
2,228 mi = 3.22 kms