There are
1,055 mi
from Thornton, CO to Owensboro, KY
That's the driving distance. It would take 18 hours 54 mins to go from Thornton, Colorado to Owensboro, Kentucky.
The flight distance (direct flight from Thornton, CO to Owensboro, KY) is 970.65 mi.
1,055 mi = 1.61 kms