Miles between Thornton, CO and Swansea, IL

There are
866 mi
from Thornton, CO to Swansea, IL

That's the driving distance. It would take 15 hours 24 mins to go from Thornton, Colorado to Swansea, Illinois.

The flight distance (direct flight from Thornton, CO to Swansea, IL) is 806.54 mi.

866 mi = 1,393.54 kms