Which city uses the airport code SJU?

The airport code SJU is designated for Luis Muñoz Marín International Airport, which serves San Juan, Puerto Rico. This code is part of the International Civil Aviation Organization (ICAO) and the International Air Transport Association (IATA) codes used to identify airports around the world. Each airport code is unique and typically reflects the name of the city or the airport itself. In this case, SJU directly corresponds to San Juan, making it the correct choice.

The other cities listed do not share this code; for instance, San Salvador has the airport code SAL, Santiago uses SCL, and San Antonio is designated as SAT. This system of airport codes helps streamline air travel logistics and is crucial for travelers and airlines alike.