I can see that the most difficult part of your trip is CRK-MNL
How to get from Clark to Manila Airport? - FlyerTalk Forums
only budget airlines fly from CRK, so you have to figure that part out.
It would be easier the fly BKK-MNL than BKK-HKG-MNL, reason being that CX has many crew who are from MNL and will go home when they are free.
You should check your agreement with CX because they are moving to E-ticket and you would need to list on myidtravel if you want to fly with them
HOLIDAY ALERT!
Chinese new year starts on 10 Feb, which means everyone from Asia will be moving as early as 8 Feb or maybe earlier if flights are full. Flights into HKG (or any chinese countries) will be full with chinese returning home for holidays and flights out will be full of people who takes advantage of the long holiday to go travel. I would assume that you would have a better chance if you fly on 10 or later (i.e. no one will travel on christmas day). I can't say your odds of HKG-HEL as I doubt there are as many Chinese returning home to HEL, but I'm quite sure there will be a lot of people going on holiday to HEL than usual.
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