Newark Liberty International Airport is an international airport straddling the boundary between the cities of Newark in Essex County and Elizabeth in Union County, New Jersey, in the United States. Located about 4.5 miles (7.2 km) south of downtown Newark and 9 miles (14 km) west-southwest of Manhattan in New York City, it is a major gateway to points in Europe, South America, Asia, and Oceania. It is jointly owned by the cities and leased to its operator, the Port Authority of New York and New Jersey. It is the second-busiest airport in the New York airport system behind John F. Kennedy International Airport but far ahead of LaGuardia Airport.

An IATA airport code, also known as an IATA location identifier, IATA station code, or simply a location identifier, is a three-letter geocode designating many airports and metropolitan areas around the world, defined by the International Air Transport Association (IATA). The characters prominently displayed on baggage tags attached at airport check-in desks are an example of a way these codes are used.