Thinking of flying to Toronto beginning of January. Would there be any issues. Any Canadians know? 

The only people who can answer your inquiry is Air Canada itself so why not contact them?

'nuf sed.

19 hours ago, Pravda said:

Thinking of flying to Toronto beginning of January. Would there be any issues. Any Canadians know? 

Check the flight bookings would be a good start to see if their are any available, if yes check the Canadian embassy regarding entry regulations into Canada.?

go to flightaware web site,it is a flight tracker,you can see when your flight depart and land,today ac6230 from bkk to hong kong  depart on time and ac4 will depart from hong kong to toronto at 7 pm hong kong time.it is a trip from bkk to montreal,i will go back canada to next april,it is seem to flight now,checked many time already

You can book your flight no problem.  If they change the flight, they will send you an email detailing the new flight.  [for ex, they may change you to a flight via Korea or Tokyo rather than HK]

If you don't like the new flight details, phone AC immediately, and you will usually find a sympathetic agent who will find u a flight that suits your own wishes.

It hardly needs adding that there are no direct AC flights from Bkk to Canada, only from one of the other Asian hubs.  AC flies to HK , various Chinese destinations, Seoul, Taipei, and Tokyo - you will be flying from BKK with JAL, Eva Air, Korean , etc etc.

Korean Air Bkk Seoul Toronto, shortest flight, the Polar route. 2 hours in Seoul going and 3 coming back.