Flight McCarran International Airport departs from Las Vegas McCarran International Airport at 11:50 and arrives at Chicago O'Hare International Airport at 17:44.The flight has a short stop at Chicago.
The flighttime is about 3h 54m. The distance travelled ("as the bird flies"): 3028 Km. So the average speed is roughly 776 Km.
There is an 2 hour time difference between Las Vegas and Chicago