Miles between Thornton, CO and Portsmouth, NH

There are
2,025 mi
from Thornton, CO to Portsmouth, NH

That's the driving distance. It would take 1 day 12 hours to go from Thornton, Colorado to Portsmouth, New Hampshire.

The flight distance (direct flight from Thornton, CO to Portsmouth, NH) is 1,772.44 mi.

2,025 mi = 3.22 kms