I referred to that itinerary many times while planning my RTW. Kudos to 3544Quebec. Some addendums make it even longer.

1) In Australia, I think SYD - PPT is the longest seg but instead of going to PER, go back to PPT again and rack up over 2,000 more miles.

2) Europe, I think there are a couple of Mid-East locations that are longer, but you can only go to the Mid-East once.

3)With the addition of LanChile, you have several long trips like SCL - CCS that you can now add which weren't available when 3544 wrote his master plan.

FWIY ,my routes were chosen by length and comfort (ie only routes that had flat seats etc.)

Good luck.

CMoss