Great question - ADL to WAW just means Adelaide Airport to Warsaw Frederic Chopin Airport. Now you’ll know what these unique codes when you look for flights! Krakow J. Paul II Balice Airport (KRK), Gdansk Rebiechowo Airport (GDN), Wroclaw Strachowice Airport (WRO), Katowice Pyrzowice Airport (KTW), Poznan Lawica Airport (POZ) are other airports near this flight route and their unique identifiers/IATA codes.