Miles between Longmont, CO and Portland, ME

There are
2,080 mi
from Longmont, CO to Portland, ME

That's the driving distance. It would take 1 day 14 hours to go from Longmont, Colorado to Portland, Maine.

The flight distance (direct flight from Longmont, CO to Portland, ME) is 1,794.47 mi.

2,080 mi = 3.22 kms