Air Canada's YVR-YYZ route is the 9th highest revenue route in the world:
http://dailyhive.com/vancouver/worlds-most-profitable-flight-routes-2018-airlines
Quite a prestigious list, nice to have a Canadian route included. And remember, this is just Air Canada, there's also Westjet with about 11 daily and sometimes Sunwing and Transat. See above link and list below:
1. British Airways - New York JFK to London Heathrow: $1.04 billion
2. Qantas Airways - Melbourne to Sydney, $855 million
3. Emirates - London Heathrow to Dubai, $819 million
4. Singapore Airlines - London Heathrow to Singapore, $710 million
5. American Airlines - Los Angeles LAX to New York JFK, $698 million
6. United Airlines - San Francisco to Newark, $688 million
7. Cathay Pacific Airways - Hong Kong to London Heathrow, $632 million
8. Qatar Airways - London Heathrow to Doha, $553 million
9. Air Canada - Vancouver to Toronto Pearson, $552 million
10. Singapore Airlines - Sydney to Singapore, $544 million