Flight International Airport departs from Los Angeles International Airport at 08:15 and arrives at Chicago O'Hare International Airport at 20:25.The flight has a short stop at Boston.
The flighttime is about 10h 10m. The distance travelled ("as the bird flies"): 3389 Km. So the average speed is roughly 333 Km.
There is an 2 hour time difference between Los Angeles and Chicago