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, Brussel, Rotterdam, Haag.

In 5 hours, you can reach Paris, Luxemburg, Antwerpen.

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

In 7 hours, you can reach Zürich.

In 8 hours, you can reach Praha, København, Schaan, Århus, Vaduz, Lyon.

In 9 hours, you can reach Wien, Birmingham, Marseille, Genève.

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