ФИБА Европа
Moraitis has been a member of the junior national teams of Greece. With Greece's junior national teams, he has played at the following tournaments: the 2014 FIBA Europe Under-16 Championship, the 2015 FIBA Europe Under-16 Championship, the 2016 FIBA Europe Under-18 Championship, the 2017 FIBA Europe Under-18 Championship, and the 2018 FIBA Europe Under-20 Championship.