Transport Canada has redefined which Canadian airports are considered 'international' and many have been removed from the list including Regina, Saskatoon, Victoria and Kelowna to name a few. Airports can apply to redesignate themselves as international. It's not clear what the ramifications are, I'm reading it likely would not affect the ability to conduct transborder flights to the US but might have a negative impact on international flights - which were common from all four of these airports in winter.
https://tc.canada.ca/en/aviation/ref...-ac-no-302-032