IT IS TOTALLY LIKE INTERNATIONAL SHIPPING SINCE THEY ARE LIKE TWO DIFFERENT NATIONS COMPARED TO LIKE PROVINCES/STATES
No, I know that, but shipping between Canada and the US is much MUCH easier, simpler, cheaper, than trying to ship overseas, or even to another country in North or South America.
But, when shipping to and from the US get's lumped in with shipping to/from Italy, Pakistan, etc., it's frustrating since I want to offer to US, but not anywhere else (and vice-versa. a lot of American seller's will say "Only ships to US, BUT will ship to Canada as well").