New Canadian immigrants returned to Canada from the United States. Can I fly back to Canada only by landing letter?

Not by plane. You must have a maple leaf card or visa to fly, otherwise the airline will not let you board the plane.

If you haven't finished your maple leaf card, there are only two ways to go back to Canada:

1? Go to the Canadian embassy or consulate in the United States to apply for a re-entry visa (one-time, designed for Canadian PR without maple leaves);

2? Fly to the nearest American city in Canada, there is a land pass to Canada, and then take a bus back to Canada from the land pass. In this case, immigration documents can be used to enter the country.