You need to include transiting cities in your circle map calculation. E.g. I don’t think there is a direct flight between Sydney and Cape Town. You need to include Jo burg or Doha, depending on the airline you choose. That might have edged you over 35,000 miles.
What I was meaning to say was, you need to go through all the routes to see whether there are direct flights or require transits/stops. I had a quick look for November (just to increase chances of more flights coming online).
I think what isn’t helping you is: quite a few of the destinations/ports aren’t really a popular oneworld hub. Hence, you will see there is quite a few flights in my mock itinerary going to and from DFW. Now, I’m not getting into whether this itinerary/routing satisfies all the Qantas oneworld RTW rules and restrictions. But one thing is for sure, if you go with this itinerary, the total mileage exceeds 35,000 miles.
What I did was fire up Google Flights to see what flights are available to get from A to B.
There are no oneworld airlines servicing JNB-CPT, you could consider booking separate flights for this but the total mileage will still be 36k+ miles.
Hope that was somewhat helpful.
I think there are plenty of paid services that help you redeem your award seats out there. I haven’t used one before so wouldn’t be able to recommend one.
This comes in at 34,709 miles just short of the 35,000 max
The first trip in a flt to Manila (cheap airline paid myself), then straight to London and will do some internal flts and then down to Istanbul, after that then a flt back to BNE for a “long stop over” and next trip is to Hong Kong and Sapporo for some snowboarding.
I have the Asia trip booked for March but will push that back to Dec next year as its free to make changes right up to the end of 2022 with no fees.
Note that your ticket is only valid for 1 year so you must complete your Japan trip within 1 year of your flight out of Manila.
Also note that once your flight out of Manila departs then your route is locked in. If you can’t find any availability BNE-HKG in December then you are stuck as you won’t be able to change your routing.