Flight McCarran International Airport departs from Las Vegas McCarran International Airport at 06:00 and arrives at Chicago O'Hare International Airport at 20:25.The flight has a short stop at Los Angeles.
The flighttime is about 12h 25m. The distance travelled ("as the bird flies"): 3028 Km. So the average speed is roughly 244 Km.
There is an 2 hour time difference between Las Vegas and Chicago