Public transport: metro/RER
From the airport Roissy Charles de Gaulle, take the RER line B direction Robinson/Saint Rémy les Chevreuses, get off at the station Châtelet, and take the RER line A direction St Germain en Laye/Poissy/Cergy St Christophe , then get off at the station Charles de Gaulle Etoile and follow the exit Avenue de Friedland. As you are in the Avenue de Friedland, go down during around 10 minutes till the end of this avenue, when the Boulevard Haussmann start. There, you should go on the left in front of the chemistry/pharmacy, you'll arrive in the Faubourg Saint Honoré street, the hotel Etoile Saint Honoré is just on the right, number 214.