Harry Reid International Airport, formerly known as McCarran International Airport, is the main international airport serving the Las Vegas Valley. The airport is a hub for more than 30 airlines and serves as a base for Allegiant Air, Frontier Airlines, JSX, Southwest Airlines, and Spirit Airlines. Southwest has been the dominant carrier at the airport since the 1990s. In 2024, Harry Reid International set a new record, welcoming over 58.4 million passengers — the highest in its history.