Here are a few suggestions for your next trip from Słupsk

In 4 hours, you can reach Posen.

In 5 hours, you can reach Varsavia.

In 6 hours, you can reach Berlino, Łódź, Breslavia.

In 7 hours, you can reach Cracovia.

In 8 hours, you can reach Amburgo.

In 9 hours, you can reach Ostrava.

In 10+ hours, you can reach Parigi, Budapest, Vienna, Stoccolma, Praga, Copenaghen, Bruxelles, Amsterdam, Vilnius, Bratislava...