Originally Posted by cy1978hk

Is there any easy and accurate way to find out if the Y class is overbook? Seat counter.com or amadeus.com only gives you how many seats are left, but it gives no hints on whether the flights are overbooked.

I've come across several experience that seatcounter/amadeus on a particular showed no availability for all sub-class, but it turned out that the flight is only 80% full; while several other experience that seatcounter/amadeus shows very abundant availability in all Y subclasses, but the flight was full at the end??