Also worth noting that CFTO has been a mainstay on western New York cable systems since the '80s. I have family as far south as Olean, and CFTO and CBLT have been on their cable system (not sure if that's the case anymore).
The Toronto stations carried quite far into New York State - especially when they started beaming from the CN Tower in 1976. I've heard over the years that Global, CFMT and CITY were also available over the air in Western New York - although (for some reason) they were never listed in TV Guide.
Hamilton's CHCH was listed in Erie PA's TV Guide for years.