OOL stands for Coolangatta Gold Coast Airport, while GRU stands for Sao Paulo Guarulhos Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. 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: Recife Guararapes Intl Airport (REC), Salvador Luis E. Magalhaes Airport (SSA), Brasilia Airport (BSB), Fortaleza Pinto Martins Airport (FOR), Rio de Janeiro–Galeão Intl Airport (GIG).