Here's something random i discovered. Charles de Gaulle duty free has better perfume prices than anywhere in the city including the Sephora on champs-élysées.

Like genuinely bonkers savings especially on french brands. Dior J'adore was €78 duty free vs €105 at galeries lafayette. Chanel no. 5 was like €30 cheaper. Selection is massive too - entire walls of just french perfume.

Obviously only works if you're flying international but if you were gonna buy perfume anyway just wait until you're leaving. Terminal 2E has the biggest selection near gate K.