Here are a few suggestions for your next trip from Trieste

In 3 hours, you can reach Liubliana, Rijeka.

In 4 hours, you can reach Milán, Kranj.

In 5 hours, you can reach Maribor.

In 6 hours, you can reach Roma, Zagreb.

In 7 hours, you can reach Graz, Nápoles, Linz.

In 8 hours, you can reach Viena, Zúrich, Múnich.

In 9 hours, you can reach Bratislava, Brno, Ginebra, Lyon, Basilea.

In 10+ hours, you can reach Berlín, París, Bucarest, Budapest, Varsovia, Estocolmo, Praga, Bruselas, Ámsterdam, Schaan...