DUS stands for Duesseldorf Intl Airport, while NAG stands for Nagpur Dr. Babasaheb Ambedkar 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: Cologne Köln/Bonn Airport (CGN), Muenster Airport (FMO), Dortmund Airport (DTM), Paderborn Airport (PAD), Düsseldorf Weeze Airport (NRN). Find deals