San Juan Luis Muñoz Marín International Airport (IATA: SJU, ICAO: TJSJ) is a public airport located in Carolina, 3 miles (5 km) southeast of San Juan, Puerto Rico. The airport is owned and managed by the Puerto Rico Ports Authority.

It is the island's main international gateway, and its main connection to the mainland United States. Domestic flights fly between Carolina and various local points of interest, including Aguadilla, Culebra, Mayagüez, Ponce and Vieques. The airport offers rapid access to San Juan, the capital of the island.

The airport serves as the Caribbean hub for American Airlines and American Eagle.

As of 2006, the airport has been receiving major upgrades, including a new Concourse A (opening April 2009), reconstruction of runway 10-28, press conference rooms, an American Airlines Admirals Club located in Concourse C, and new fast food franchises along it's corridors, like Wendy’s, McDonalds, Subway and Taco Maker, just to mention a few.

Also, the airport has a Hotel, a barber's shop, beauty salons, souvenir kiosks, duty free shops, a Banco Popular de Puerto Rico branch and many ATMs all over the facility.