Cologne Airport Transfer Information Bus, Train and Taxi from Cologne's Airport to the city. Cologne Airport Transfer Konrad Adenauer Airport — 14 km from the city. Bus Services  — Line 170 serves the city center with frequencies between 12-30 minutes and operating from 6.05 am to 11.05 pm. The journey time is about 20 minutes and the fare is EUR 5 per person. Intercity Trains — the Hauptbahnhof (main railway station) is located in the center of the city, next to the Cathedral. The ICE service from Frankfurt Airport connects foreign travellers direct to Cologne in less than one hour. Taxis — Taxis from the airport take up to four persons and cost about EUR 25 to the city. First published 18 May 2004 Book Cologne Hotels here