Great question - AMS to MCY just means Amsterdam Schiphol Airport to Maroochydore Sunshine Coast Airport. Now you’ll know what these unique codes when you look for flights! Eindhoven Airport (EIN), Rotterdam The Hague Airport (RTM), Maastricht/Aachen Airport (MST), Groningen Eelde Airport (GRQ) are other airports near this flight route and their unique identifiers/IATA codes.