As per March 15th 2016, Canada has implemented a mandatory entry requirement: the Electronic Travel Authorization (ETA). The ETA will apply to all visa-exempt foreign nationals who fly to or transit through Canada (US Citizens and those who still require a visa to enter into Canada are exempt). The application is done on line and the authorization is usually received within minutes after submitting the information. The cost is $7 CDN.
Please visit: http://www.cic.gc.ca/english/visit/visas.asp for more info.
How to get from Montreal-Pierre Elliot Trudeau International Airport to the city
The International Airport is located Southwest of downtown Montreal. Getting to/from the airport is easily done and will take no more than 40 minutes.
Airport taxi -the airport taxi's will bring you downtown Montreal for 40 CAD.
Bus - the 747 P-E-Trudeau Airport/Downtown bus runs 24/7 between Montréal-Trudeau airport and the central bus station (Gare d'autocars de Montréal - Berri-UQAM métro station). For information on the route, schedules, and hotels nearby Click here. Fare: 10 CAD.
Shuttle bus - Click here to find out which hotels make use of an airport shuttle service.
To get a detailed overview of public transport you can visit STM.