Miles between Boulder, CO and Gaithersburg, MD

There are
1,677 mi
from Boulder, CO to Gaithersburg, MD

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

The flight distance (direct flight from Boulder, CO to Gaithersburg, MD) is 1,489.82 mi.

1,677 mi = 1.61 kms