Miles between Thornton, CO and Kelso, WA

There are
1,273 mi
from Thornton, CO to Kelso, WA

That's the driving distance. It would take 21 hours 56 mins to go from Thornton, Colorado to Kelso, Washington.

The flight distance (direct flight from Thornton, CO to Kelso, WA) is 1,001.67 mi.

1,273 mi = 1.61 kms