KIX-BKK
I booked two Aeroplan business class tickets between KIX and BKK on TG (Thai Airways) on the web. It cost me 30,000 Aeroplan points per person and initially no extra fees of any kind.
However, at KIX, I was reminded by a Thai agent that I had to pay 5,300 yen (2,650 yen x 2) KIX airport facility fee. There were no other charges of any kind.
Incidentally I flew YVR-NRT-ITM on a regular ticket (about 1,050 per person).
It is quite clear that better deals are found when and where no Canadian airport and AC flights were not involved.