By plane from Roissy CDG :
Take the Air France bus line 2 : Roissy / Porte Maillot / Etoile.
At Etoile go to the RER station and take line A to St Germain en Laye.
or
Take RER B to Châtelet/Les Halles. Change to RER A in the direction of St Germain en Laye. |