Here are a few suggestions for your next trip from Köln

In 2 hours, you can reach Brüssel.

In 3 hours, you can reach Amsterdam, Antwerpen.

In 4 hours, you can reach Paris, Luxemburg, Hamburg, Rotterdam.

In 5 hours, you can reach London, Berlin, Esch-an-der-Alzette, München.

In 6 hours, you can reach Zürich, Lyon.

In 7 hours, you can reach Schaan, Birmingham, Vaduz.

In 8 hours, you can reach Marseille, Genf, Liverpool.

In 9 hours, you can reach Wien, Prag, Mailand, Århus.

In 10+ hours, you can reach Madrid, Rom, Budapest, Warschau, Stockholm, Kopenhagen, Zagreb, Bratislava, Laibach, Monaco...