Cologne Bonn Airport (German: Flughafen Köln/Bonn Konrad Adenauer) (IATA: CGN, ICAO: EDDK) is the international airport of Germany's fourth-largest city Cologne, and also serves Bonn, the former capital of West Germany. With approximately 12.4 million passengers passing through it in 2017, it is the seventh-largest passenger airport in Germany and the third-largest in terms of cargo operations. By traffic units, which combines cargo and passengers, the airport is in fifth position in Germany. As of March 2015, Cologne Bonn Airport had services to 115 passenger destinations in 35 countries. The airport is named after Cologne native Konrad Adenauer, the first post-war Chancellor of West Germany. The facility covers 1,000 hectares (2,500 acres) and contains three runways.

The airport is located in the district of Porz and is surrounded by Wahner Heide, a nature reserve. The airport is centrally located in the Cologne Bonn Region 12 km (7.5 mi; 6.5 nmi) southeast of the Cologne city centre and 16 km (9.9 mi; 8.6 nmi) northeast of Bonn. Cologne Bonn Airport is one of the country's few 24-hour airports and serves as a hub for Eurowings, FedEx Express and UPS Airlines as well as a focus city for several leisure and low-cost airlines. It is also a host of a training centre for the German (DLR) and European (EAC) astronaut programmes, part of the European Space Agency.