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Metro: when will the future lines 15, 16, 17, and 18 finally open?

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The Editor

©ALSTOM – Samuel Dhote / Société du Grand Paris

After years of teasing us with mountains and wonders about the future metro lines, it seems that access to the 4 new lines of the Île-de-France Mobilités (IDFM) network is getting closer and closer, especially with the imminent launch of line 18. But more broadly, when will each of the lines be accessible?

Yes, in recent years, the progress of the Grand Paris Express project has been quite an emotional rollercoaster for our nerves, especially with the opening of line 15 being pushed back over and over. It seems we are finally on a plane heading to cloud nine. And for good reason, line 18 should finally fulfill our wishes, with a scheduled opening as early as next autumn. Even better, its construction is on a very (very) good track.


A Major Advancement

Promised as a new major route for traveling in the Île-de-France region, line 18, in a lovely mint green or glacier blue (which quite cunningly resembles line 6's color), is set to open its doors by 2030. But a first section is expected to be operational a bit sooner, starting next October, between the stations.

s de Massy-Palaiseau and Christ-de-Saclay. And the latest tests are showing miracles for future users. In fact, not only have they broke speed records (a whopping 110 km/h, while the maximum recorded speed was only 80 km/h until now), but also, in the last few days, the first driverless journeys have been completed, and everything went smoothly without a hitch. The final crucial step before opening: the security commission review, likely in June.


A Packed Schedule Ahead!

So, while the first tracks for these futuristic subways are set to start running in just a few months, when can we expect to see the entire lines fully operational? The answer is simple: not just yet. But since we’re feeling generous, we’re sharing with you the currently announced schedule by IDFM, hoping that this time the deadlines will be respected. So here’s what to expect, line by line and section by section, for now:

Line 15 :
Between Pont de Sèvres and Noisy-Champs : 2027
Between Pont de Sèvres and Saint-Denis-Pleyel : 2031
Between Saint-Denis-Pleyel and Champigny Centre : 2031

Line 16 :
Between Saint-Denis-Pleyel and Clichy-Montfermeil : 2027
Between Clichy-Montfermeil and Noisy-Champs : 2028

Line 17 :
Between Saint-Denis-Pleyel and Le Bourget Airport : 2027
Between Le Bourget Airport and Parc des Expositions : 2028
Between Parc des Expositions and Le Mesnil-Amelot (via CDG) : 2030

Line 18 :
Between Massy-Palaiseau and Christ-de-Saclay : October 2026
Between Massy-Palaiseau and Orly Airport

y: 2027
Between Christ de Saclay and Versailles-Chantiers: 2030