Originally Posted by
Simontony
Excellent - this makes perfect sense now. Thanks all for your help. I have decided to stay with QF as living in Singapore, it is easy and cheap to qualify for the 4 legs on QF using Jetstar.
You can solve your 4-leg issue on BA by booking SIN-MEL/BNE/PER etc, with a connection out of Sydney by Qantas (booked in a BA codeshare number, it counts as an eligible flight.)
It is *some* effort, but you might like the 100% bonus miles on those BA business trips later on