Originally Posted by remdk

RUN4FUN Like you I have always insisted that it was the departure class that determined lounge access. I have stated this several times in the "QR lounges at HIA" thread. I still hold that view but as I have also said there are a number of unpublished exceptions. This however is a published exception.

As you point out "This lounge is only available to customers traveling in First and Business class cabins Qatar Airways and other oneworld members flights. Guests are not permitted." But OW rules modify that "Lounge access will be determined on the international long haul ticketed flight (either First of Business Class) regardless of the ticketed class of travel on the international short haul or domestic flight."

Thus if you arrive long haul in F or J and depart short haul in Y then according to OW rules you are a Premium passenger and can access the Premium lounges.