Here are a few suggestions for your next trip from Koszalin

In 4 hours, you can reach Poznań.

In 5 hours, you can reach Berlijn, Wrocław.

In 6 hours, you can reach Warschau.

In 7 hours, you can reach Hamburg, Łódź.

In 8 hours, you can reach Krakau, Ostrava.

In 9 hours, you can reach Praag, München, Frankfurt am Main.

In 10+ hours, you can reach Parijs, Boedapest, Wenen, Stockholm, Kopenhagen, Brussel, Amsterdam, Vilnius, Bratislava, Zürich...