Which current US airport previously was known by IATA code IDL?

John F. Kennedy International Airport was originally called Idlewild Airport (IATA: IDL) after the Idlewild Beach Golf Course that it displaced. The project was renamed Major General Alexander E. Anderson Airport in 1943 after a Queens resident who had commanded a Federalized National Guard unit in the southern United States died in late 1942. In March 1948, the New York City Council changed the name to New York International Airport, Anderson Field, but it was commonly known as Idlewild Airport before being renamed in 1963 in memory of John F. Kennedy, the 35th President of the United States, following his assassination.

John F. Kennedy International Airport (IATA: JFK) (often referred to as Kennedy Airport, New York-JFK or simply JFK) is the primary international airport serving NYC. It is the busiest international air passenger gateway into North America, the 22nd-busiest airport in the world, the sixth-busiest airport in the US, and the busiest airport in the New York airport system. JFK handled just over 59 million passengers in 2017.

JFK is located in the neighborhood of Jamaica in the borough of Queens, in New York, 16 miles (30 km) southeast of Midtown Manhattan. The airport features six passenger terminals and four runways. It serves as a hub for both American Airlines and Delta Air Lines, and it is the primary operating base for JetBlue Airways. In the past, JFK was a hub for Pan Am, TWA, Eastern, National, and Tower Air.