Miles between Longmont, CO and Frederick, MD

There are
1,641 mi
from Longmont, CO to Frederick, MD

That's the driving distance. It would take 1 day 5 hours to go from Longmont, Colorado to Frederick, Maryland.

The flight distance (direct flight from Longmont, CO to Frederick, MD) is 1,465.11 mi.

1,641 mi = 1.61 kms