MEL and GDN 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. MEL to GDN refers to a flight route from Melbourne Airport to Gdansk Rebiechowo Airport. Melbourne Avalon Airport (AVV), Melbourne Essendon Airport (MEB), Mildura Airport (MQL), Bendigo Airport (BXG), Melbourne Moorabbin Airport (MBW) are other airports near this flight route and their unique identifiers/IATA codes.