Teenager Desire Doue scored twice for PSG and set up the opening goal for Achraf Hakimi in Munich's Allianz Arena before Khvicha Kvaratskhelia made it four and then 19-year-old substitute Senny Mayulu completed the scoring.
PSG took the lead after 12 minutes when Hakimi sidefooted home a pass from Doue.
The Parisians went 2-0 ahead eight minutes later when their defender Willian Pacho improbably kept the ball from going out at the PSG end and the resulting fast-flowing move led to Doue firing in a deflected shot that evaded Inter goalkeeper Yann Sommer.
PSG made it 3-0 with a goal created by Vitinha's surging run. He exchanged passes with Ousmane Dembele, before delivering a pass into the path of 19-year-old Doue who drilled the ball into the net.
The match was put beyond doubt by Georgian international Kvaratskhelia's brilliant low finish before Mayulu rounded off a slick passing move.
Qatari-owned PSG are just the second French club since Marseille in 1993 to win European football's top trophy.
© 2025 AFP