Your route from Charles de Gaulle is simple. Take RER B Charles de Gaulle Airport heading toward Saint-Remy-les-chevreuses. Depart at the Châtelet les Halles and then take metro line 4 toward Porte d'Orleans. Stop when you reach Saint Placide. A short walk up rue de Rennes will take you to the hotel.
Arriving From Orly Airport
Here you take the RATP Orly Airport bus and disembark at Denfert Rochereau. Next take metro line 4 heading to Porte de Clignancourt. Get off at the Saint Placide stop. A short walk up rue de Rennes will bring you to the Hotel Royal St. Germain.