My Alerts Discover the new Mon transport adapté reservation site
Try out the preliminary version of the new site, redesigned to simplify booking and tracking trips, with a more user-friendly interface and improved online help. The SIRTA site is still running, but as of March 11, 2026, Mon transport adapté will replace it completely.
Cancelling a reservation within the STM service area
Any cancellations should be done as soon as possible by telephone, by dialing
514- 280-8211, through the automated service, through an agent (option 2), or online.
Cancelling metropolitan transportation
Users living outside the STM service area must contact their carrier to request, change, or cancel trips to or within the STM service area.
Late cancellation
Cancellations are considered to be late if they are made less than 2 (two) hours before the confirmed boarding time.
It is important nevertheless, to cancel trips even to just a few minutes before the arrival of the vehicle, so as not to deprive other users of space on board and to reduce delays.
Late cancellations without reasonable notice or at the door deprive other clients from from using of onboard space, cause delays, and create additional costs for the STM.