There are
1,095 mi
from Thornton, CO to Hopkinsville, KY
That's the driving distance. It would take 19 hours 31 mins to go from Thornton, Colorado to Hopkinsville, Kentucky.
The flight distance (direct flight from Thornton, CO to Hopkinsville, KY) is 967.88 mi.
1,095 mi = 1.61 kms