Miles between South San Francisco, CA and Mercer Island, WA

There are
818 mi
from South San Francisco, CA to Mercer Island, WA

That's the driving distance. It would take 15 hours 51 mins to go from South San Francisco, California to Mercer Island, Washington.

The flight distance (direct flight from South San Francisco, CA to Mercer Island, WA) is 685.19 mi.

818 mi = 1,316.21 kms