Just noticed while i look for a flight ORD - BKK OW or BKK-ORD OW and RT.. UA pricing goes straight to Y class pricing. Look at advaance mode and only shows availability in Y,B,M.. there are only a few seats sold so i know the booking classes are available, Called 1K desk and they dont see why the other booking classes open either? it happens to many dates post Dec 1... Are they trying to sell Full Fare Y before releasing cheaper WSTLK tickets... There are like 95% of the plane still open