There are
1,639 mi
from Lakewood, CO to Gaithersburg, MD
That's the driving distance. It would take 1 day 6 hours to go from Lakewood, Colorado to Gaithersburg, Maryland.
The flight distance (direct flight from Lakewood, CO to Gaithersburg, MD) is 1,482.49 mi.
1,639 mi = 1.61 kms