The New York City metropolitan area's John F. Kennedy International Airport, LaGuardia Airport, and Newark Liberty International airports are the largest airport system in the United States. They are the second busiest system of airports in the world by number of passengers. They are the busiest in the world in terms of total flight operations. In 2012, the airport had just under 34 million million passengers. JFK had 49.3 million, and LaGuardia had 25.7 million.