Jetstar - Melbourne (MEL) to Ho Chi Minh City (SGN) - 308 AUD / $203 USD roundtrip on scattered dates February through May. I don't know much about how Jetstar fares map to Qantas loyalty program, but I believe you need a Plus fare to get QF points and Status Credits and a Plus fare is 489 AUD / $322 roundtrip.

This will earn 80 QF Status Credits and 7800 QF points. Cost per Status Credit is 489 / 80 = 8.15 AUD, which is high.

Google Flights
https://www.google.com/travel/flight...DR8Gc9s48jXcv9

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