All you have to do is prove your lawful permanent resident status – easily done with your green card – and provide photo ID. ... Note: In some circumstances, a U.S. citizen can use a birth certificate for proof of citizenship when entering Canada, but green card holders cannot. read more
No Air Visits Without a Passport. Unfortunately, you can't travel to Canada by air with an expired passport.Here's why: Although U.S. green card holders don't need a visa to enter Canada, you do need an electronic travel authorization, or eTA, to enter by air. read more