To reach the Ecole Polytechnique from: Charles de Gaulle Airport. Take the RER B direction St. Rémy-lès Chevreuse, get off at Lozère or Massy-Palaiseau (this takes about an hour). Orly Airport. Take the Orlyval to Antony (about 10 minutes). … A train station in Paris. Take the Metro to reachRead More →