An electronic travel authorization, or eTA is a document that is designed to simplify the process of entering Canada by air. When presented to an immigration official at a port of entry, it allows travellers to enter Canada an unlimited number of times for up to six months per visit. Your eTA is electronically linked to your passport, which means it can only be used with the same passport that is listed on your eTA confirmation.
You need to apply for an eTA before flying to Canada, or being in transit through a Canadian airport in the following circumstances:
It is your responsibility to verify what documents are needed before you book your travel to Canada. Although the process of applying for an eTA is quick and easy, you should avoid making travel arrangements until your eTA has been issued.