Miles between Frederick, MD and Longmont, CO

There are
1,638 mi
from Frederick, MD to Longmont, CO

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

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

1,638 mi = 2,636.00 kms