How Montréal's REM opened 23 stations in three phases

Opening weekend and regular service had separate dates

The South Shore section was inaugurated on 28 July 2023 and held public trial rides over the weekend. Regular service began on 31 July. The timeline uses the start of service for the count, which was five stations from Brossard to Gare Centrale. Source 1

The largest step was the Deux-Montagnes opening

The November 2025 phase added 14 stations and made it possible to travel on REM between the South Shore and North Shore. That one phase accounts for 14 of the 23 stations opened in the three documented service launches. Source 2 Source 1 Source 3

The West Island opening came before the airport branch

The Anse-à-l'Orme branch added four stations on 18 May 2026. The operator separately identifies Marie-Curie and the YUL airport station as part of the airport branch. Its schedule lists that branch for 2027, and its October update records testing progress. Source 3 Source 6 Source 5

Two more stations entered planning

The June 2026 announcement launched planning for Griffintown-Bernard-Landry and a second station near Bridge and Wellington streets. REM says the first was already part of the original alignment and the second still needed an exact location and name. Both remain separate from the service opening count. Source 4

Sources

• REM South Shore service inauguration and start
• REM official opening of 14 stations, 17 November 2025
• REM confirms West Island service, 18 May 2026
• REM announces planning for two additional stations
• REM airport branch testing update, 22 October 2026
• REM network commissioning schedule and airport station plans