Um visto de trânsito canadense permite a entrada por até 48 horas em cada entrada. Você tem permissão para sair do aeroporto. (E não há taxa para o visto de trânsito, mas você pode ter que pagar uma taxa de serviço VFS.)
Os detalhes aqui . A partir de 27 de fevereiro de 2017:
If you need a visa to visit Canada, then you need a transit visa to travel through Canada without stopping or visiting. This is true even if you are in Canada for less than 48 hours. There is no fee for a transit visa. You can apply for a transit visa by filling out the application for a visitor visa (Temporary Resident Visa) and selecting transit visa from the list of options on the form.
If you need an eTA to visit Canada, then you also need an eTA to transit through Canada without stopping or visiting. An eTA costs $7 CAD and it only takes a few minutes to apply for one.
You may not need a transit visa or an eTA if you travel to or from the United States. The Transit Without Visa program (TWOV) and the China Transit Program (CTP) allow certain foreign nationals to transit through Canada on their way to and from the United States without a Canadian transit visa or eTA, if they meet certain requirements.
New entry requirement now in effect
Visa-exempt foreign nationals need an Electronic Travel Authorization (eTA) to fly to or transit through Canada. Exceptions include U.S. citizens and travellers with a valid Canadian visa. Canadian citizens, including dual citizens, and Canadian permanent residents cannot apply for an eTA.