推荐回答（2个）
这个是不算的，加拿大移民局官网上有明确的说明，如果你持有单次往返签证，并该签证还在有效期内，你从加拿大直接入境美国及其领土，并且只入境美国及其领土，那么返回的时候就不需要一个新的visa。但是返回的日期不能超过签证有效期。
A single entry visa allows you to come to Canada only one time. Once you have left Canada, excluding travel to the United States and St. Pierre and Miquelon, you will need a new visa to travel back to and enter Canada.
If your visa is still valid and you are travelling only and directly to the United States (including its Territories and Possessions) or St. Pierre and Miquelon, you do not need a new visitor visa to return to Canada. If your visa expires before returning to Canada from one of these areas, and you are not in possession of a valid visitor record, work permit, study permit, or temporary resident permit (authorizing re-entry), you will need to get a new visitor visa.
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