Gabriel Barbosa netted two penalties for the Brazilian side, while his strike partner Pedro also struck twice in Tangier, Morocco.
Ahmed Abdelkader had netted a brace for Al Ahly to give them the lead but after defender Ali Maaloul missed a penalty, Khaled Abdelfattah's red card in the 69th minute tilted the game in Flamengo's favour and they won emphatically.
Flamengo's next match will be played next Thursday against Volta Redonda in the Carioca Serie A.
Spanish giants Real Madrid face Al-Hilal of Saudi Arabia in the final in Rabat later on Saturday.
February 11, 2023