There are
2,336 mi
from Pasadena, TX to Seatac, WA
That's the driving distance. It would take 1 day 17 hours to go from Pasadena, Texas to Seatac, Washington.
The flight distance (direct flight from Pasadena, TX to Seatac, WA) is 1,893.47 mi.
2,336 mi = 3.22 kms