On Frinday I am embarking on a LHONE4 out of MEL, total cost AUD3,853.10 per person, base fare $3479 & +++ of $374.10.
Routing is MEL-SYD-JF,LGE-ORD-SEA-DFW-ORD-LHR,LGW-DBV-LGW,LHR-SIN-HKG-BKK-HKG-NRT-SYD-CNS-MEL
This was booked using AA ATW desk and by booking through AA, it cost over 700 per person less in +++ had the same routing been booked through Qantas. (YMMV).
For more, see my thread on "Australian Frequent Flyer":