These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Bacolod Airport to Lima J Chavez Intl Airport flight would often be abbreviated as a BCD to LIM flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Cusco Velazco Astete Airport (CUZ), Arequipa Rodriguez Ballon Airport (AQP), Piura Airport (PIU), Chiclayo Cornel Ruiz Airport (CIX), Trujillo Airport (TRU). Find deals