McCarran International Airport (IATA: LAS) is the main commercial airport for the Las Vegas Valley and Clark County, Nevada. It is about 5 miles (8.0 km) south of downtown Las Vegas, in the unincorporated area of Paradise in Clark County. It covers roughly 2,800 acres (1,100 ha), with four runways and two terminals. McCarran is owned by Clark County and operated by the Clark County Department of Aviation (DOA). The airport is named after former Nevada senator Pat McCarran (1876–1954).
The airport is a focus city and the largest operating base for Allegiant Air and Southwest Airlines. In February 2012, McCarran also became a crew and maintenance base for Spirit Airlines.
McCarran is the 24th busiest airport by passenger traffic in the world, with 41,856,787 passengers passing through the airport in 2013. In terms of aircraft movements, the airport ranks 8th in the world with 527,739 takeoffs and landings.
Between April 2014 and March 2015, the busiest scheduled airlines flying out of McCarran were Southwest Airlines (44%), United Airlines (9%), Delta Air Lines (9%), American Airlines (7%), and Spirit Airlines (6%). Canadian airline WestJet is McCarran’s largest international carrier, transporting over 1 million passengers in 2013 and connecting Las Vegas with 11 cities in Canada. Wikipedia