Cernay is a railway station in the commune of Ermont (Val-d'Oise department), France. The station is served by trains of the Paris Nord line H and the RER C. It takes around 25 minutes to reach Paris Gare du Nord or Neuilly Porte Maillot stations from Gare de Cernay. External links Railway stations in Val-d'Oise Réseau Express Régional stations Railway stations in France opened in 1988