Miles between Thornton, CO and Round Rock, TX

There are
921 mi
from Thornton, CO to Round Rock, TX

That's the driving distance. It would take 16 hours 42 mins to go from Thornton, Colorado to Round Rock, Texas.

The flight distance (direct flight from Thornton, CO to Round Rock, TX) is 766.02 mi.

921 mi = 1,481.99 kms