Here are a few suggestions for your next trip from Köln

In 2 hours, you can reach Bruxelles.

In 3 hours, you can reach Amsterdam, Antwerpen.

In 4 hours, you can reach Paris, Luxembourg, Hamborg, Rotterdam.

In 5 hours, you can reach London, Berlin, Zürich, Esch-sur-Alzette.

In 7 hours, you can reach Schaan, Vaduz.

In 8 hours, you can reach Wien, Prag, Birmingham, Marseille, Geneve.

In 9 hours, you can reach København, Bratislava, Milan, Århus.

In 10+ hours, you can reach Madrid, Rom, Bukarest, Budapest, Warszawa, Stockholm, Dublin, Zagreb, Ljubljana, Monaco...