Flight Tacoma International Airport departs from Seattle Tacoma International Airport at 07:00 and arrives at New York La Guardia Airport at 19:12.The flight has a short stop at Chicago.
The flighttime is about 9h 12m. The distance travelled ("as the bird flies"): 5376 Km. So the average speed is roughly 584 Km.
There is an 3 hour time difference between Seattle and New York