The 204 Cardinal bus line, operated by the STM public transit service serves Montréal–Trudeau from the Dorval train station.
Furthermore, the 209 bus line connects the Roxboro-Pierrefonds commuter train station to Montréal–Trudeau.
To get to the bus stop, go to door 28 at the Arrivals level and follow the signs "STM"
Fares: adult one-way / $3.25*
* Please be sure to provide the exact amount to the driver as he can not give change.