Here are a few suggestions for your next trip from Dortmund

In 3 hours, you can reach Amsterdam, Hamburg.

In 4 hours, you can reach Berlin, Brussels, Rotterdam, The Hague.

In 5 hours, you can reach Paris, Luxembourg, Antwerp.

In 6 hours, you can reach London, Esch-sur-Alzette, Munich.

In 7 hours, you can reach Zürich.

In 8 hours, you can reach Prague, Copenhagen, Schaan, Århus, Vaduz, Lyon.

In 9 hours, you can reach Vienna, Birmingham, Marseille, Geneva.

In 10+ hours, you can reach Rome, Budapest, Warsaw, Stockholm, Dublin, Zagreb, Bratislava, Ljubljana, Barcelona, Milan...