With next week's visit to New Brunswick, TAR: Canada will have visited every province/territory in just 2 seasons. Maybe this means that they'll do an all international route in season 3.
So with the knowledge that this route will likely not happen except for in my head, here's a "dream route" based off of some of Air Canada's current locations & a route that I'd want to race:
Montreal- Minneapolis/St. Paul, MN (start with 11 teams, end with 10)
Twin Cities- Havana, Cuba (start with 10, end with 9)
Havana- Cayo Coco, Cuba (start with 9, NEL #1)
Cayo Coco- London, UK(start with 9, end with 8)
London- Liverpool, UK (start with 8, end with 7)
Liverpool- Zurich, Switzerland (start with 7, NEL #2)
Zurich- Istanbul, Turkey (start with 7, end with 6)
Istanbul- Seoul, South Korea (start with 6, end with 5)
Seoul- Sydney, Australia (start with 5, end with 4)
Sydney- Buenos Aires, Argentina (start with 4, NEL #3)
Buenos Aires- San Francisco, CA (start with 4, end with 3)
San Francisco- Edmonton (final leg)