Miles between Thornton, CO and Amarillo, TX

There are
423 mi
from Thornton, CO to Amarillo, TX

That's the driving distance. It would take 8 hours 2 mins to go from Thornton, Colorado to Amarillo, Texas.

The flight distance (direct flight from Thornton, CO to Amarillo, TX) is 364.15 mi.

423 mi = 680.59 kms