Flight McCarran International Airport departs from Las Vegas McCarran International Airport at 17:55 and arrives at Chicago O'Hare International Airport at 04:55.The flight has a short stop at San Francisco.
The flighttime is about 9h 00m. The distance travelled ("as the bird flies"): 3028 Km. So the average speed is roughly 336 Km.
There is an 2 hour time difference between Las Vegas and Chicago