Miles between Longmont, CO and Gaithersburg, MD

There are
1,661 mi
from Longmont, CO to Gaithersburg, MD

That's the driving distance. It would take 1 day 6 hours to go from Longmont, Colorado to Gaithersburg, Maryland.

The flight distance (direct flight from Longmont, CO to Gaithersburg, MD) is 1,479.75 mi.

1,661 mi = 1.61 kms