Roissy Charles de Gaulle
Metro + RER: Take the RER B from the airport on the way to Orly Sud/Robinson/Saint Rémy les Chevreuse stop at Saint Michel Notre Dame and take the metro line 10 towards Gare d’Austerlitz and stop at Maubert Mutualité.
Orly Airport:
Metro + RER: Take the RER B from the airport towards Aéroport Charles de Gaulle and stop at Saint Michel Notre Dame then take the métro line 10 towards Gare d’Austerlitz and stop at Maubert Mutualité.