Flight International Airport departs from Los Angeles International Airport at 06:00 and arrives at Chicago O'Hare International Airport at 14:55.The flight has a short stop at San Francisco.
The flighttime is about 6h 55m. The distance travelled ("as the bird flies"): 3389 Km. So the average speed is roughly 490 Km.
There is an 2 hour time difference between Los Angeles and Chicago