Flight McCarran International Airport departs from Las Vegas McCarran International Airport at 11:50 and arrives at Los Angeles International Airport at 13:10.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 377 Km. So the average speed is roughly 283 Km.
The best month to arrive at Las Vegas is May and the most expensive month to fly is July. (Average prices, based on 215 datapoints.)
We have a lot more statistics for flights AS 2014 and between Las Vegas and Los Angeles.