There are
1,158 mi
from Tustin, CA to Seatac, WA
That's the driving distance. It would take 21 hours 56 mins to go from Tustin, California to Seatac, Washington.
The flight distance (direct flight from Tustin, CA to Seatac, WA) is 975.61 mi.
1,158 mi = 1.61 kms