There are
1,955 mi
from Gaithersburg, MD to Montrose, CO
That's the driving distance. It would take 1 day 11 hours to go from Gaithersburg, Maryland to Montrose, Colorado.
The flight distance (direct flight from Gaithersburg, MD to Montrose, CO) is 1,644.23 mi.
1,955 mi = 3,145.65 kms