MERCURE PARIS PTE VERSAIL EXPO. . Coming from Porte St Cloud or Rouen, Lille or from CDG Airport, take the outer ring road, exit Porte de Versailles, and continue towards Porte de la Plaine. Coming from Porte d Orleans, Lyon, Bordeaux, Reims or from Orly Airport, take the inner ring road, exit Porte de la Plaine.