Line 14 thus becomes the longest metro line in Île-de-France, with a total length of 30 kilometers and 21 stations! By 2025, 1 million trips will be made on this line every day.
A true backbone of the Grand Paris Express, it will connect with the future metro lines 15, 16, 17, and 18. Starting now, new connections are possible thanks to the extensions:
- Saint-Denis – Pleyel :




- Maison Blanche :




- Chevilly-Larue :



- Thiais – Orly :


- Aéroport d’Orly :


et Orlyval
This extension is part of the Grand Paris Express project, led by the Société des Grands Projets (SGP). On February 24, 2015, the SGP temporarily transferred project management to the RATP for the southern section (excluding the stations Villejuif - Gustave Roussy and Aéroport d'Orly, which are under the management of SGP and Aéroports de Paris, respectively). The northern section remains under the management of SGP.
