Here are a few suggestions for your next trip from Grajewo
In 2 hours, you can reach Białystok.
In 4 hours, you can reach Warszawa.
In 6 hours, you can reach Łódź, Kowno, Gdańsk, Bydgoszcz, Lublin, Gdynia, Marijampolė.
In 7 hours, you can reach Kraków, Poznań, Katowice, Częstochowa, Sosnowiec.
In 8 hours, you can reach Wilno, Wrocław.