There are
1,667 mi
from Broomfield, CO to Gaithersburg, MD
That's the driving distance. It would take 1 day 5 hours to go from Broomfield, Colorado to Gaithersburg, Maryland.
The flight distance (direct flight from Broomfield, CO to Gaithersburg, MD) is 1,480.93 mi.
1,667 mi = 2,682.75 kms