BKK and GRU are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. BKK to GRU refers to a flight route from Bangkok Suvarnabhumi Airport to Sao Paulo Guarulhos Intl Airport. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Brasilia Airport (BSB), Recife Guararapes Intl Airport (REC), Salvador Luis E. Magalhaes Airport (SSA), Porto Alegre Salgado Filho Airport (POA), Fortaleza Pinto Martins Airport (FOR).