Airports:
Charles de Gaulle Etoile: 20 km by taxi, shuttle or RER B to Orly, change at Châtelet terminal, then take the RER A to Saint Germain en Laye/Poissy, and then exit at the Auber terminal.
ROISSY Bus that drives until behind the Opéra House;
Gare de Lyon: metro line n°14 towards gare st. lazare and get off at Pyramides.
Orly: 15 km by taxi, shuttle or RER B to Roissy, change at Châtelet terminal, then take the RER A to Saint Germain en Laye/Poissy, and then exit at the Auber terminal.
Metro Terminals
Gare de l'Est: taxi or subway line 7 to Mairie d'Ivry-Villejuif, then exit at the Opéra terminal.
Gare du Nord: taxi, or RER B to Roissy and then change at Châtelet terminal; from there, take the RER A to Saint Germain en Laye/Poissy, and then exit at the Auber terminal or Line 4, to Porte d'Orléans , change at Strasbourg Saint-Denis, then Line 8 to Balard, exit at Opéra.
Gare d'Austerlitz: taxi or Line 5 Metro to Bobigny, then to République; from there, take Line 3 to Pont de Levallois Bécon, then exit at Quatre Septembre or Opéra.
Gare Montparnasse: taxi or Line 12 Metro to Porte de la Chapelle, then transfer at the Concorde terminal; take the corresponding Line 8 to Créteil Préfecture, and then exit at the Opéra terminal.
Gare Saint-Lazare: taxi or Line 3 Metro to Gallieni, then exit at Opéra (2 terminals).
Station de Lyon: taxi or take Line 14 Metro to Saint Lazare; from there, continue to Madeleine, then take Line 8 to Créteil-Préfecture, and then exit at the next stop; Opéra.
Freeway :
From the A1, A6 and A10, take the Porte de Châtillon route to Avenue Denfert-Rochereau, then continue on Boulevard Saint-Michel. From there, continue on the Pont Saint-Michel, then take the Place du Châtelet and the Avenue de l'Opéra; from there, continue to the right on Rue Saint-Augustin.