Miles between Longmont, CO and Mercer Island, WA

There are
1,274 mi
from Longmont, CO to Mercer Island, WA

That's the driving distance. It would take 22 hours 5 mins to go from Longmont, Colorado to Mercer Island, Washington.

The flight distance (direct flight from Longmont, CO to Mercer Island, WA) is 991.19 mi.

1,274 mi = 1.61 kms