Here are a few suggestions for your next trip from Koszalin

In 4 hours, you can reach Poznań.

In 5 hours, you can reach Berlín, Breslavia.

In 6 hours, you can reach Varsovia.

In 7 hours, you can reach Hamburgo, Łódź.

In 8 hours, you can reach Cracovia, Ostrava.

In 9 hours, you can reach Praga, Múnich, Fráncfort del Meno.

In 10+ hours, you can reach París, Budapest, Viena, Estocolmo, Copenhague, Bruselas, Ámsterdam, Vilna, Bratislava, Zúrich...