The Opéra metro station, serving metro lines 3, 7 and 8, and the RER-A line, is 150 meters from the hotel, at Place de l'Opéra.
From Place de l'Opéra: walk down the Avenue de l'Opera; the Rue d'Antin will be the third street on your left.  The hotel is located at number 18 on the rue d'Antin in the 2nd district of Paris.

From the Roissy Charles de Gaulle airport (25 km):

Take the Roissy Bus to the "Rue Scribe" and then walk to the Place de l'Opéra.
 
By car: 30 minutes
 
Take the "A1 sud" motorway to the Porte de la Chapelle exit and follow the "Centre ville / Gare St. Lazare" signs.  Then head in the direction of "Opéra".  At the Place de l'Opéra, turn right onto the Avenue de l'Opéra.  Turn left at the first stoplight and continue straight ahead on the Rue du 4 Septembre.  Take the second right (Rue de Port-Mahon) and the first street on your right will be the Rue d'Antin.  To reach the nearest parking garage, continue on this same street for about 100 meters, to the Rue du Marché Saint-Honoré.

From the Gare St. Lazare (800 meters from the hotel):
Take Metro line 3 in the direction of Gallieni and get off at the Opéra station. Leave the station by the "Place de l'Opéra" exit.
 
From the Gare du Nord (Eurostar / Thalys trains):
Take the RER-B line in the direction of "Robinson" or "Saint-Rémy-les-Chevreuse" and get off at the Châtelet Les Halles station.  Change to the RER-A line, direction "Cergy", "Poissy" or "St. Germain en Laye".  Get off at the Auber station and leave the station by the "Place de l'Opéra" exit.

From the Gare de l'Est:
Metro line 7, direction "Villejuif-Louis Aragon" will take you directly to the Opéra station.

From the Gare de Lyon:
Take the RER-A line in the direction of  "Cergy", "Poissy" or "St. Germain en Laye".  Get off at the Auber station and leave the station by the "Place de l'Opéra" exit.