Newark Liberty International Airport (IATA: EWR, ICAO: KEWR, FAA LID: EWR), originally Newark Metropolitan Airport and later Newark International Airport, is one of the major airports of the Port Authority of New York and New Jersey and is located in the U.S. state of New Jersey. The airport straddles the boundary between the cities of Newark and Elizabeth, the former of which is the most populous city in the state. The airport is owned jointly by the cities of Elizabeth and Newark and leased to and operated by the Port Authority of New York and New Jersey.Newark Airport is located 3 miles (4.8 km) south of Downtown Newark, and 9 miles (14 km) west-southwest of the borough of Manhattan. It is one of four major airports serving the New York City - Philadelphia Urban Area, the others being Philadelphia International Airport, John F. Kennedy International Airport and LaGuardia Airport.In 2017, EWR was the sixth busiest airport in the United States by international passenger traffic and fifteenth busiest airport in the country. It served 43,393,499 passengers in 2017, which made EWR the forty-third busiest airport in the world by passenger traffic. In 2018, the airport saw 46,065,175 passengers, the most in its history. Newark serves 50 carriers and is the third-largest hub (after Chicago–O'Hare and Houston–Intercontinental) for United Airlines, which is the airport's largest tenant (operating in all three of Newark's terminals). Newark's second-largest tenant is FedEx Express, whose third-largest cargo hub uses three buildings on two million square feet of airport property. During the 12-month period ending in July 2014, over 68% of all passengers at the airport were carried by United Airlines.