There are
876 mi
from Provo, UT to Seatac, WA
That's the driving distance. It would take 15 hours 25 mins to go from Provo, Utah to Seatac, Washington.
The flight distance (direct flight from Provo, UT to Seatac, WA) is 727.59 mi.
876 mi = 1,409.19 kms