There are
1,140 mi
from Whittier, CA to Seatac, WA
That's the driving distance. It would take 21 hours 40 mins to go from Whittier, California to Seatac, Washington.
The flight distance (direct flight from Whittier, CA to Seatac, WA) is 957.31 mi.
1,140 mi = 1.61 kms