In addition to your passport, you may need a travel authorization such as a visa or an Electronic Travel Authorization (eTA) to enter Canada. 1. Get your passport, credit or debit card ready, and read the help document.Apply online for an eTA. Quick Facts: Passport Validity: Valid at time of entry. Blank Passport Pages: One page required. When using U.S. preclearance facilities at a Canadian airport, you must meet U.S. entry requirements. The enhanced cards meet the travel document requirements under the Western Hemisphere Travel Initiative. You must be physically present in the United States when you file the Reentry Permit application. NEXUS and FAST members who are permanent residents of the U.S. must still travel with a passport and proof of permanent residence. Foreign nationals should contact their respective governments to obtain passport and VISA information.