Most people book flights to the McCarran Airport in Las Vegas (Airport code LAS). Spring and Fall season in USA are the ideal times to go to Las Vegas.
Summer can get pretty hot, but you may get cheaper rates for flights and hotels. Free shuttles are available from the airport to many of the area hotels and resorts.
Sometimes, you may be able to check-in at the airport to the hotels because there may be long lines at the hotel itself, especially if it is a large hotel or a popular one. You may also take taxis to the hotels.
