There are
870 mi
from Orem, UT to Seatac, WA
That's the driving distance. It would take 15 hours 19 mins to go from Orem, Utah to Seatac, Washington.
The flight distance (direct flight from Orem, UT to Seatac, WA) is 723.12 mi.
870 mi = 1,400.77 kms