There are
1,449 mi
from Thornton, CO to Asheville, NC
That's the driving distance. It would take 1 day 2 hours to go from Thornton, Colorado to Asheville, North Carolina.
The flight distance (direct flight from Thornton, CO to Asheville, NC) is 1,256.32 mi.
1,449 mi = 1.61 kms