Do I need an electronic travel authorization to travel to Canada?

Visa-exempt Australians travelling to Canada by air must have an Electronic Travel Authorization (eTA), even if only transiting through a Canadian airport. The eTA is valid for up to five years and allows multiple entries. It's not required for entry by land or sea. 

Any advice is general advice only and does not take into account your individual objectives, financial situation, or needs. As entry and visa requirements for Canada may change over time, it is your responsibility to verify entry and visa requirements with the official government authorities including the Immigration, Refugees and Citizenship Canada, the Canada Border Services Agency, and the Canadian High Commission in Australia.