I'm guessing you mentioned this bit because you are aware of the fact that you can fly from there back to BKK nonstop at 0915a every day of the week except for Tuesdays and Saturdays.... but, in case you didn't, I'm telling you.

I would definitely go Y on this route, even if the differential between Y and C is miniscule, because: 1) C isn't good; 2) SWA is a breeze; and 3) I assume CZ only does it for some strange political reasons and that it can't be that full.

If I'm wrong about #3, I'll pick up the bar tab the next time you're in Beijing.