There are
1,996 mi
from Thornton, CO to Haverhill, MA
That's the driving distance. It would take 1 day 12 hours to go from Thornton, Colorado to Haverhill, Massachusetts.
The flight distance (direct flight from Thornton, CO to Haverhill, MA) is 1,758.29 mi.
1,996 mi = 1.61 kms