The Koeln/Bonn airport (CGN) is closest to our office. From there you can reach us via...
Taxi: 20 minutes, approx. € 27
Train: 25 minutes, approx. € 3 (get off at Koeln Deutz/Messe, Cologne central station Koeln Hauptbahnhof, or Cologne Hansaring), then take a taxi or continue by underground