Flight O'Hare International Airport departs from Chicago O'Hare International Airport at 10:05 and arrives at Denver International Airport at 18:07.The flight has a short stop at New York.
The flighttime is about 9h 02m. The distance travelled ("as the bird flies"): 1864 Km. So the average speed is roughly 206 Km.
There is an 1 hour time difference between Chicago and Denver