Miles between Thornton, CO and Green River, WY

There are
343 mi
from Thornton, CO to Green River, WY

That's the driving distance. It would take 5 hours 57 mins to go from Thornton, Colorado to Green River, Wyoming.

The flight distance (direct flight from Thornton, CO to Green River, WY) is 261.84 mi.

343 mi = 552.49 kms