If you're renting a car, chances are you'll be coming here for one. As the hub for most well known car rental brands, this place is super easy to get to from McCarran airport.
Once out of the airport main entrance, make a left and there should be shuttle waiting. The shuttles are never overcrowded plus the ride takes under 10 mins. I recommend going with Hertz and signing up for their gold club status ( free ). We took the escalator up the next floor and was help fairly quickly. In and out within 10 mins plus a free upgrade to a Cadillac. Yeaaa baby.