You have to buy 4 one way Canada flights tickets for $130 each, then you can buy a $199 return flight to Hong Kong, total price including taxes for everything is $755
Even if you throw away that 4 one way ticket, you can still go to HK for $755, which is way cheaper than buying regular. Go somewhere for a weekend lor.
Catch is you have to book by Janurary 28, travel before June 15.
Basically you have to buy a package, it's call the escape pass. Escape pass is pacakge of 4 or 8 one way tickets within Canada.
So after you buy the 4 one way tickets for $130 each (plus tax), which equals to $546, then you can purchase a return ticket to Hong Kong for $199 + tax = 208.95, so total is $755
You can buy the 4 one way ticket from Canada to US too, but the total will be more expensive as the 4 one way ticket cost more than $130 each, so IF you can use those one way tickets, then it's up to you.
Catch is you have to use the 4 one way tickets from Jan 15 to May 3, and the trip to HK have to be between April 14 to June 15
I booked this pass already. The price for the (cheapest) pass is $745 including all tax and surcharges. The catch is that your international trip (HK, London, Paris, plus few more) need to be in between mid-April to late-June. It is $745 for a round trip to HK, plus 2 round trips with BC/AB. Yes, 3 round trips in total.
If the time fits your vacation (which I do), it is the cheapest in the market right now.