Miles between Thornton, CO and Alton, TX

There are
1,181 mi
from Thornton, CO to Alton, TX

That's the driving distance. It would take 21 hours 13 mins to go from Thornton, Colorado to Alton, Texas.

The flight distance (direct flight from Thornton, CO to Alton, TX) is 1,013.63 mi.

1,181 mi = 1.61 kms