Flight International Airport departs from Los Angeles International Airport at 08:50 and arrives at Chicago O'Hare International Airport at 21:55.The flight has a short stop at Boston.
The flighttime is about 11h 05m. The distance travelled ("as the bird flies"): 3389 Km. So the average speed is roughly 306 Km.
There is an 2 hour time difference between Los Angeles and Chicago