There are
1,254 mi
from Thornton, CO to Dearborn Heights, MI
That's the driving distance. It would take 22 hours 19 mins to go from Thornton, Colorado to Dearborn Heights, Michigan.
The flight distance (direct flight from Thornton, CO to Dearborn Heights, MI) is 1,139.34 mi.
1,254 mi = 1.61 kms