This is just an IATA (International Air Transport Association) code. IATA codes are used in aviation to identify and differentiate airports. That’s why a San Juan Luis Munoz Marin Intl Airport flight would often be abbreviated as a SJU flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: San Juan Isla Grande Airport (SIG), Ponce Mercedita Airport (PSE), Vieques Airport (VQS), Culebra Airport (CPX), Ceiba J. Aponte de la Torre Airport (NRR).
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