Dear flyers,

I am wondering what is the booking subclasses hierarchy for Cathay's (revenue) Economy class. I am suspecting that using ITN, the order (from highest to lowest) are as follows:

Y B H K M L S V

Presuming the above to be correct, I would like to ask for your opinion on the avalability of each of the sub-classes during the high/shoulder season. From my experience, "Y" often remains until the end, whereas "L", "S", "V" usually goes very quick. However, my interest lies in the middle 4, which are often the sub-classes I purchase my tickets in.

In terms of avaliability, how do the "B", "H", "K", and "M" rank with respect to each other? I realize "B" has rather higher priority than the rest, but what will be the next-in-line? I will appreciate any opinions, particularly from those who are familiar with the industry.

Thanks