Newark Liberty International Airport (IATA: EWR, ICAO: KEWR, FAA LID: EWR), first named Newark Airport and later Newark International Airport, is an international airport within the city limits of both Newark and Elizabeth, New Jersey, United States (although it is entirely owned by the city of Newark). It is about 15 miles (24 km) southwest of Midtown Manhattan (New York City). The airport is operated by the Port Authority of New York and New Jersey, which also manages the two other major airports in the New York/New Jersey metropolitan area, John F. Kennedy International Airport (JFK) and LaGuardia Airport (LGA), in addition to three smaller airports, Stewart International Airport, Teterboro Airport and the Downtown Manhattan Heliport. Newark is the tenth busiest airport in the United States and the nation's fifth busiest international air gateway; JFK ranks first. Newark Liberty is the second-largest hub, after George Bush Intercontinental Airport in Houston, for Continental Airlines, which is the airport's largest tenant (operating all of Terminal C and part of Terminal A). Primarily due to this large hub operation, Continental Airlines is by far the leading carrier in the New York market. Once the merger between Continental and United Airlines is complete, Newark will be the third largest hub for United Airlines. Newark's second largest tenant is FedEx Express, which operates its third largest cargo hub from the airport. FedEx operates from three buildings on two million square feet within the airport complex. In 2008, Newark Airport handled slightly more than 35.4 million passengers, compared with JFK's 47.8 million and LaGuardia's 23.1 million. In total over 107 million passengers used New York-area airports in 2008, making the New York-area the busiest airport system in the United States in terms of passenger numbers and second in the world behind London.