PSG are aiming to add the Ligue 1 title, the French Cup and the Champions League to the French Super Cup this season
Paris St-Germain battled from two goals down to beat second-tier Dunkerque 4-2 and book their place in the French Cup final.
Ousmane Dembele pulled a goal back on the stroke of half-time before Marquinhos and Desiree Doue added goals in the second half to complete the turnaround.
Dembele then added his second of the match in stoppage time.
The holders had fallen two goals behind inside just 27 minutes as Vincent Sasso and Muhannad Al Saad struck to build a commanding lead for the side currently fifth in Ligue 2.
But as the hosts tired, the Parisians used their firepower to reach the final on 24 May, where they will face either Cannes or Reims.
The victory ensures that Luis Enrique's side retain hopes of winning a quadruple this season.
With the French Super Cup secured in January, they stand on the cusp of winning the French title, needing just a point from their match with 14th placed Angers on Saturday.
They also hold aspirations of reaching the last four of the Champions League, although they will need to overcome Premier League side Aston Villa, led by former PSG boss Unai Emery.
