Miles between Thornton, CO and Slidell, LA

There are
1,299 mi
from Thornton, CO to Slidell, LA

That's the driving distance. It would take 23 hours 50 mins to go from Thornton, Colorado to Slidell, Louisiana.

The flight distance (direct flight from Thornton, CO to Slidell, LA) is 1,082.36 mi.

1,299 mi = 1.61 kms