RTL 421 bus Stop List and Next Departures
The RTL 421 - Grande-Allée / A.-Frappier bus serves 45 bus stops in the Montréal area departing from Terminus Longueuil and ending at 5100 Armand-Frappier. Scroll down to see upcoming 421 bus times at each stop and the next scheduled 421 bus times will be displayed. The full 421 bus schedule as well as real-time departures (if available) can be found in the Transit app.
RTL 421 bus route map
The RTL 421 - Grande-Allée / A.-Frappier bus route map is shown above. The route map shows you an overview of all the stops served by the RTL 421 bus to help you plan your trip on RTL. Opening the app will allow you to see more detailed information about the route on a map including stop specific alerts, such as stops that have been closed or moved. You can also see the location of vehicles in real-time on the route map so you know when the 421 bus is approaching your stop.
See the detailed route mapRTL 421 bus Service Alerts
Open the Transit app to see more information about any active disruptions that may impact the 421 bus schedule, such as detours, moved stops, trip cancellations, major delays, or other service changes to the bus route. The Transit app also allows you to subscribe to receive notifications for any service alert issued by RTL so that you can plan your trip around any active or future disruptions.
See all alertsRTL 421 bus Service Frequency
The next 421 bus leaves Terminus Longueuil at 6:30 AM, and arrives at 5100 Armand-Frappier at 7:09 AM. You can see the frequency of upcoming trips and the exact departure times by opening the Transit app.
See all departuresRTL 421 bus On-Time Performance
Want to know whether the RTL 421 bus arrives on time? Open the Transit app and view user generated on-time performance reports for the 421 bus. You can also contribute your own reports on whether your trip arrived on time, late or early. As these on-time performance stats are user reported, they may differ from official RTL metrics.
See all on-time perfomance details