There are
1,780 mi
from Thornton, CO to Yonkers, NY
That's the driving distance. It would take 1 day 8 hours to go from Thornton, Colorado to Yonkers, New York.
The flight distance (direct flight from Thornton, CO to Yonkers, NY) is 1,628.03 mi.
1,780 mi = 1.61 kms