Originally Posted by kuroko

Hi Justin

It it more or less the same structure i.e in Y:
X/V = Special
T/Q/L = Saver
U/B/M/W = Flex
R/E/Y = Flex Plus

For some routings they are a little bit "flexible" with the fare type/booking class, i.e an O class can be a Special or a Saver.

I guess since the new fare branding the idea is to get away from the booking classes and just booked the fare type (actually it doesn't make a difference for the regular customer if he books an U oder a W class as both are Flex and have the same conditions)