Flight La Guardia Airport departs from New York La Guardia Airport at 07:55 and arrives at Las Vegas McCarran International Airport at 13:01.The flight has a short stop at Houston.
The flighttime is about 8h 06m. The distance travelled ("as the bird flies"): 4586 Km. So the average speed is roughly 566 Km.
There is an 3 hour time difference between New York and Las Vegas