For Qantas Platinum on arrival, no onward flight required.
www.australianfrequentflyer.com.au
Ironically denying the world to "World" Platinum....
No. Except for the situation of pax arriving from MEL on QF9 who are continuing on to LHR (who are funneled through a corridor back to the Int departures area), on arrival you are sent down the escalators to immigration and customs, and then dumped landside like every other Int terminal in Australia.
It depends on how international arrivals are set up. In some circumstances (i.e. some EU airports) when you arrive from an overseas flight you are in the departures area of international (non-Schengen) terminal. In which case it is simple work to simply physically walk to the lounge to get lounge access. However, as others have pointed, many international airports are set up such that you have to either re-clear a checkpoint or go through immigration (i.e. USA) and thus won't be able to access the departures hall since you don't posses a valid boarding pass for a flight departing that airport that day.
Qantas Domestic lounges only but same day international travel applies (as does domestic) for such access.
www.australianfrequentflyer.com.au
One thing to keep in mind is accessing said lounges requires switching terminals and clearing security which may not be practical if you checked a large roller bag, or are unfortunate to arrive in SYD from overseas given the trek involved with going from T1 to T3. It is a real shame that QF doesn’t provide an international arrivals lounge given the volume of premium traffic involved. Then again, there is that Plaza Premium Arrivals lounge at SYD INT if you’re lucky enough to have a credit card with priority pass benefits
I don't do this. The only reason I have checked a bag while travelling internationally in the last decade is "Wine".
Forgive me for my naivety, but it has been close to a decade since I've been to KL, if I'm not mistaken upon arrival at KL you are in the departures area and then like Singapore have to clear security at that gate is that correct? In which case I suppose one could waltz up to a MH lounge before clearing immigration and entering the country.
It is my understanding that access to international QF lounges on arrival is not permitted irrespective of status. What is unique about AA is they say, if you are arriving on a AA or OW flight you can access our Admiral/Flagship lounge same-day.
I would tend to agree with your assessment here for OneWorld lounges at LAX. I suppose if one was lucky to be holding a ticket for a domestic AA/AS flight with OWE status and provided they are departing at the right time (i.e. later in the morning or afternoon) when the QF Flounge is open, that may be your best bet (esp if you don't mind the hike between terminals).
I did visit the AS broom cupboard on departure at LAX since I was departing out of T6 and didn't see the need to schlep between terminals that early in the morning. Also, I think there are many proud Tasmanians who would take offence to the AS lounge at LAX being referred to as a broom cupboard, when they have to deal with the Qantas Club at HBA. And for the record, yesterday I flew SFO > LAX > PDX > SEA > LAX as part of a mileage run. I visited the AS lounges at SFO, LAX, PDX and SEA. SEA is clearly the best AS lounge out there in terms of space and amenities (I suppose that's why most people informally refer to AS as Seattle Airways). Oh and I also visited the AmEx Centurion lounge at SEA which is arguably the best Centurion lounge I've been to so far having been to the ones at MEL, SYD, DEN, LAX, PHX and SFO. Then lastly I visited the Flagship lounge at 10:40 PM on arrival from that mileage run (AA lounges at LAX are open till 1 AM).
