Here are a few suggestions for your next trip from Regen

In 3 hours, you can reach Linz, Munich, Pilsen, Nürnberg.

In 4 hours, you can reach Vienna, Salzburg.

In 5 hours, you can reach Bratislava, Prague, Frankfurt am Main, Stuttgart, České Budějovice, Innsbruck.

In 6 hours, you can reach Berlin, Brno, Mauren, Trnava, Győr, Ruggell, Hradec Králové, Ústí nad Labem, Pardubice, Schellenberg...

In 7 hours, you can reach Budapest, Schaan, Graz, Hamburg, Vaduz, Triesen.