Flight O'Hare International Airport departs from Chicago O'Hare International Airport at 20:15 and arrives at San Francisco International Airport at 23:12.The flight has a short stop at San Francisco. The flighttime is about 4h 57m. The distance travelled ("as the bird flies"): 3832 Km. So the average speed is roughly 774 Km. There is an 2 hour time difference between Chicago and San Francisco