There are
1,780 mi
from Thornton, CO to Newburgh, NY
That's the driving distance. It would take 1 day 8 hours to go from Thornton, Colorado to Newburgh, New York.
The flight distance (direct flight from Thornton, CO to Newburgh, NY) is 1,617.44 mi.
1,780 mi = 1.61 kms