Why can Canadians can still freely enter the U.S. by air and not by land? @sophiaharrisCBC Has your answer. https://t.co/bRcvBt8Goz

— CBC News (@CBCNews) July 22, 2021

To decrease the spread of COVID-19, including the Delta variant, the United States is extending restrictions on non-essential travel at our land and ferry crossings with Canada and Mexico through August 21, while ensuring the continued flow of essential trade and travel.

— Homeland Security (@DHSgov) July 21, 2021