There are
2,575 mi
from Reno, NV to Gaithersburg, MD
That's the driving distance. It would take 1 day 20 hours to go from Reno, Nevada to Gaithersburg, Maryland.
The flight distance (direct flight from Reno, NV to Gaithersburg, MD) is 2,255.59 mi.
2,575 mi = 3.22 kms