Gare du Nord is well connected to the Paris RER network. Lines B and D call at platforms under the station. Line B serves Charles de Gaulle Airport (Roissy), Mitry – Claye in the north-east of the city and Antony (for Orly Airport), Massy-Palaiseau) (for Massy TGV and Saint-Rémy-lès-Chevreuse in south-west Paris. Line D offers a quick connection between Gare du Nord and Gare de Lyon and many areas of south-east Paris. Line D also operates to northern Paris, to Saint-Denis and Creil.