There are
1,839 mi
from Thornton, CO to Plattsburgh, NY
That's the driving distance. It would take 1 day 9 hours to go from Thornton, Colorado to Plattsburgh, New York.
The flight distance (direct flight from Thornton, CO to Plattsburgh, NY) is 1,634.60 mi.
1,839 mi = 1.61 kms