Flight O'Hare International Airport departs from Chicago O'Hare International Airport at 18:20 and arrives at New York John F Kennedy International Airport at 21:51.
The flighttime is about 2h 31m. The distance travelled ("as the bird flies"): 1571 Km. So the average speed is roughly 624 Km.
There is an 1 hour time difference between Chicago and New York