Las Vegas airport is McCarran International Airport.
It is conveniently located 3 km and minutes away from Las Vegas Strip, where most hotels and entertainment is.
McCarran airport services approximately 1,000 flights daily, both domestic and international. It is a large airport with a good infrastructure. And given it is Las Vegas, one can of course start gambling as soon as he steps off the plane - slot machines are available throughout the airport building.
There are multiple transportation options: public transport, taxis, shuttle buses. For more information, see the Transportation from Las Vegas airport section.