There are
1,150 mi
from Fullerton, CA to Seatac, WA
That's the driving distance. It would take 21 hours 48 mins to go from Fullerton, California to Seatac, Washington.
The flight distance (direct flight from Fullerton, CA to Seatac, WA) is 965.98 mi.
1,150 mi = 1.61 kms