Here are a few suggestions for your next trip from Gdynia

In 4 hours, you can reach Warszawa, Poznań.

In 5 hours, you can reach Łódź, Wrocław.

In 6 hours, you can reach Berlin, Kraków.

In 8 hours, you can reach Ostrawa.

In 9 hours, you can reach Hamburg, Brno.

In 10+ hours, you can reach Paryż, Budapeszt, Wiedeń, Sztokholm, Praga, Bruksela, Amsterdam, Wilno, Bratysława, Zurych...