There are
3,005 mi
from Worcester, MA to Seatac, WA
That's the driving distance. It would take 2 days 5 hours to go from Worcester, Massachusetts to Seatac, Washington.
The flight distance (direct flight from Worcester, MA to Seatac, WA) is 2,455.98 mi.
3,005 mi = 4,836.58 kms