 On July 31, 2019, Flaccadori signed a two-year contract with Bayern Munich of the Basketball Bundesliga (BBL) and the EuroLeague.Flaccadori was part of the Italian junior national teams on several occasions.He competed in the 2012 FIBA Europe Under-16 Championship, guided the Italian Under-18 national team to gold at the 2014 Albert Schweitzer Tournament, he was picked by the website Eurobasket.com for their unofficial 2014 FIBA Europe Under-18 Championship's Second Team the same year, was named to Eurobasket.com's unofficial 2015 FIBA Under-19 World Championship All-Second Team, and also played at the 2015 FIBA Europe Under-20 Championship.