Miles between Boulder, CO and Kelso, WA

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

That's the driving distance. It would take 22 hours 3 mins to go from Boulder, Colorado to Kelso, Washington.

The flight distance (direct flight from Boulder, CO to Kelso, WA) is 982.86 mi.

1,273 mi = 1.61 kms