If you don't have one, you won't be able to board your flight.
When you travel to Canada make sure you have: your letter of introduction. valid passport or travel document. if you're visa-required, it must contain the visa sticker that we put in it. if you need an eTA and you're flying to a Canadian airport, it must be the passport that's electronically link to your eTA.
An Electronic Travel Authorization (eTA) is an entry requirement for visa-exempt foreign nationals travelling to Canada by air. An eTA is electronically linked to a traveller's passport. It is valid for up to five years or until the passport expires, whichever comes first.
Visa-exempt foreign nationals need an eTA to fly to or transit through a Canadian airport. These travellers do not need an eTA when arriving by car, bus, train or boat (including a cruise ship).
Each applicant 18 years and older must complete this form. The documents needed depend on whether a child under 18 years of age will travel with only 1 parent, with a relative or friend, or alone. Submit these with your visa application. Show the border services officer when you arrive in Canada.
In addition to your passport, you may need a travel authorization such as a visa or an Electronic Travel Authorization (eTA) to enter Canada. Consult Immigration, Refugees and Citizenship Canada's website to learn which authorization you need: Find out if you need a visa to travel to Canada.
CBP encourages travelers to apply for a travel authorization at least 72 hours in advance of their anticipated arrival at a U.S. land port of entry. I am a citizen of Canada? No, citizens of Canada who are traveling with a Canadian passport do not need an ESTA.
Before you arrive in Canada, you may be asked to complete a Customs Declaration Card. Complete this card before meeting with customs and immigration officials, even if you aren't a Canadian citizen. If you're traveling by air, it's a good idea to complete the card before you leave the airplane.
U.S. citizens are exempt from the eTA requirement and must carry proper identification such as a valid U.S. passport. Lawful permanent residents of the United States who hold valid status in the U.S. are exempt from the eTA requirement.
You can make your customs and immigration declaration using Advance Declaration in the ArriveCAN app before you fly into one of Canada's participating airports. Benefits include: enjoy a more modern travel experience with a digital self-serve tool.