There are
1,783 mi
from Thornton, CO to Haverstraw, NY
That's the driving distance. It would take 1 day 8 hours to go from Thornton, Colorado to Haverstraw, New York.
The flight distance (direct flight from Thornton, CO to Haverstraw, NY) is 1,622.26 mi.
1,783 mi = 1.61 kms