Miles between Thornton, CO and Mercer Island, WA

There are
1,288 mi
from Thornton, CO to Mercer Island, WA

That's the driving distance. It would take 22 hours 18 mins to go from Thornton, Colorado to Mercer Island, Washington.

The flight distance (direct flight from Thornton, CO to Mercer Island, WA) is 1,009.15 mi.

1,288 mi = 1.61 kms