Flight O'Hare International Airport departs from Chicago O'Hare International Airport at 21:20 and arrives at Seattle Tacoma International Airport at 23:58.
The flighttime is about 4h 38m. The distance travelled ("as the bird flies"): 3824 Km. So the average speed is roughly 825 Km.
There is an 2 hour time difference between Chicago and Seattle
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