Flight Tacoma International Airport departs from Seattle Tacoma International Airport at 06:38 and arrives at Chicago O'Hare International Airport at 16:25.The flight has a short stop at Los Angeles.
The flighttime is about 7h 47m. The distance travelled ("as the bird flies"): 3824 Km. So the average speed is roughly 491 Km.
There is an 2 hour time difference between Seattle and Chicago