Flight O'Hare International Airport departs from Chicago O'Hare International Airport at 08:45 and arrives at Vancouver International Airport at 14:09.The flight has a short stop at Denver.
The flighttime is about 7h 24m. The distance travelled ("as the bird flies"): 3921 Km. So the average speed is roughly 530 Km.
There is an 2 hour time difference between Chicago and Vancouver