A new bus line numbered 815 is set to start running in mid‑June 2026, providing a direct link between the Des Sources REM station and Montreal‑Trudeau Airport. The service will operate throughout the summer months and continue into the fall, giving West Island residents a dedicated public‑transit option for airport travel.
The route will begin at the Des Sources station, a stop on the REM rapid‑transit network that serves Montreal’s western suburbs. From there, the 815 bus will travel straight to the airport terminals, eliminating the need for multiple transfers that have previously complicated the journey for commuters and travelers from the West Island.
Officials announced the addition of the 815 line as part of an effort to strengthen transit connections between the REM system and the airport. The move addresses a long‑standing gap in the public‑transport infrastructure, as the West Island has historically lacked a direct, single‑ride service to Trudeau Airport. By linking the two hubs, the new route aims to make it easier for residents to reach the airport for both business and leisure trips.
The 815 bus will run on a regular schedule, aligning with peak travel times to accommodate flight departures and arrivals. While exact frequency details have not been released, the service is expected to complement existing REM trains and other bus routes that serve the broader Montreal area. The introduction of this line reflects ongoing investments in the region’s transit network, which has expanded significantly since the REM opened.
As the summer season approaches, the 815 bus is poised to become a key piece of the transportation puzzle for West Island commuters, offering a straightforward, reliable alternative to driving. The route’s launch marks a notable step toward a more integrated public‑transit system that connects residential neighborhoods with major travel hubs.
The new line will remain in operation through the fall, providing a seasonal but potentially lasting improvement to the city’s mobility options for those traveling to and from the airport.