The Aiport Köln Bonn is the base airport of several low fare airlines:
If you arrive at Aiport Köln Bonn you should take the S13 or RE8 towards Köln. When you reach Köln-Ehrenfeld, continue your trip to the Evoke location as outlined here. The S13 won't go to Ehrenfeld during the weekend. On saturday and sunday either take the RE8 to Ehrenfeld or take the S13 to Hauptbahnhof (HBF) and change to the S12 to Ehrenfeld. The whole trip costs 2,20 Eur ("CityTicket 1b").
From the airport Frankfurt Hahn you should take the bus to Cologne. The bus takes little more than 2 hours and costs 15 €. The bus stops behind Cologne main station. Continue your trip as outlined here.
Some of the major airports are in close range to cologne.
From the Düsseldorf airport you should take the train to Cologne. The trip takes about 30 minutes and a ticket costs less than 10 €.
The real Frankfurt airport is connected to cologne by a highspeed-train. It takes only 50 minutes from the airport to cologne's central station but as you can imagine the trainticket is rather expencive.
For other airports (Frankfurt, Düsseldorf) you will have to take the train to Cologne central station. Continue your trip as outlined here.
Please, get in touch with us if you have got some questions.