Here are a few suggestions for your next trip from Sønderborg

In 3 hours, you can reach Århus, Odense.

In 4 hours, you can reach Kopenhaga, Hamburg.

In 5 hours, you can reach Malmö, Aalborg.

In 6 hours, you can reach Berlin.

In 8 hours, you can reach Göteborg, Kolonia.

In 9 hours, you can reach Amsterdam, Utrecht.

In 10+ hours, you can reach Paryż, Budapeszt, Warszawa, Wiedeń, Sztokholm, Praga, Bruksela, Zagrzeb, Oslo, Bratysława...