There are
829 mi
from Sunnyvale, CA to Seatac, WA
That's the driving distance. It would take 16 hours 1 min to go from Sunnyvale, California to Seatac, Washington.
The flight distance (direct flight from Sunnyvale, CA to Seatac, WA) is 696.95 mi.
829 mi = 1,333.76 kms