CGN stands for Cologne Köln/Bonn Airport. Codes like this one 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.
If you book a flight to Cologne, you will be flying into Köln/Bonn, which is the city’s only airport. Cologne Köln/Bonn (CGN) is located 15.2 km from the center of Cologne.
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