Miles between Gresham, OR and Thornton, CO

There are
1,222 mi
from Gresham, OR to Thornton, CO

That's the driving distance. It would take 20 hours 56 mins to go from Gresham, Oregon to Thornton, Colorado.

The flight distance (direct flight from Gresham, OR to Thornton, CO) is 965.72 mi.

1,222 mi = 1.61 kms