Flight O'Hare International Airport departs from Chicago O'Hare International Airport at 07:50 and arrives at New York La Guardia Airport at 11:11.
The flighttime is about 2h 21m. The distance travelled ("as the bird flies"): 1560 Km. So the average speed is roughly 664 Km.
There is an 1 hour time difference between Chicago and New York