There are
851 mi
from Sunnyvale, CA to Sammamish, WA
That's the driving distance. It would take 16 hours 29 mins to go from Sunnyvale, California to Sammamish, Washington.
The flight distance (direct flight from Sunnyvale, CA to Sammamish, WA) is 709.80 mi.
851 mi = 1,369.85 kms