Miles between Thornton, CO and San Juan, TX

There are
1,179 mi
from Thornton, CO to San Juan, TX

That's the driving distance. It would take 21 hours 7 mins to go from Thornton, Colorado to San Juan, Texas.

The flight distance (direct flight from Thornton, CO to San Juan, TX) is 1,023.44 mi.

1,179 mi = 1.61 kms