Here are a few suggestions for your next trip from Koper

In 3 hours, you can reach Lublana, Rijeka.

In 4 hours, you can reach Kranj, Celje.

In 5 hours, you can reach Maribor.

In 6 hours, you can reach Zagrzeb, Graz.

In 7 hours, you can reach Mediolan.

In 8 hours, you can reach Rzym, Turyn.

In 9 hours, you can reach Wiedeń, Monachium, Linz.

In 10+ hours, you can reach Berlin, Paryż, Budapeszt, Warszawa, Sztokholm, Praga, Bruksela, Amsterdam, Bratysława, Zurych...