Miles between Thornton, CO and Portland, ME

There are
2,075 mi
from Thornton, CO to Portland, ME

That's the driving distance. It would take 1 day 13 hours to go from Thornton, Colorado to Portland, Maine.

The flight distance (direct flight from Thornton, CO to Portland, ME) is 1,794.91 mi.

2,075 mi = 3.22 kms