!!!! Warning !!!! : I give this list for informational purposes ONLY ... Some of these territories or countries still apply for a visa for permanent Canadian resident card holders when they do not have a normal passport (refugee travel document) . It is therefore always necessary to contact the embassy, the consulate, or the high commission before the trip to be sure.
Outside Canada[edit]
For visa-free travels, Canadian permanent residents require a PR card, unless the person's passport in itself is sufficient for exemption. A Canadian PR card holder may travel visa-free to the following countries if not already exempt:
For non-visa-exempt nationals, UK allows holders of a valid PR card issued after 2002 to transit without visa under TWOV program.
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Source :
https://en.wikipedia.org/wiki/Canada_permanent_resident_card#Outside_Canada