There are
1,723 mi
from Thornton, CO to Ogdensburg, NY
That's the driving distance. It would take 1 day 7 hours to go from Thornton, Colorado to Ogdensburg, New York.
The flight distance (direct flight from Thornton, CO to Ogdensburg, NY) is 1,534.75 mi.
1,723 mi = 1.61 kms