There are
2,010 mi
from Thornton, CO to Newburyport, MA
That's the driving distance. It would take 1 day 12 hours to go from Thornton, Colorado to Newburyport, Massachusetts.
The flight distance (direct flight from Thornton, CO to Newburyport, MA) is 1,768.17 mi.
2,010 mi = 3.22 kms