Nope.
The problem is;
All the claims made as "we flight Santiago from Sydney" all are rounders. So all of them are suspicious. This is main problem.
It's easy to claim that all contradicting evidence is lies (although defamation proceedings might arise). But it doesn't address the point I raised.
Just now I went onto the Qantas booking page, and went through a booking from Sydney to Santiago for the coming Wenesday. Looks like the plane (assuming it exists) is nearly full. I stopped only when I reached the payment page, because I don't actually want to go to Santiago. Anyone, including a flat-earth believer, can try this. So, the question is, what would happen if I tried to pay, as I would likely do if I actually wanted to travel. There are various possible outcomes. Firstly, my payment would be rejected. Secondly, it would be accepted, but between now and Wednesday, I'd be informed that the flight was cancelled. Thirdly, I might board the plane, which leaves Sydney, only to be diverted for some alleged technical reason. Fourthly, it might actually fly to Santiago, but take 28 hours longer than the claimed flight time.
Any of those scenarios, particularly if repeated over and over, would surely cause complaint. Where are those complaints? If the world's massive conspiracy is censoring them, why does it allow this forum to exist? Why allow flat-earther believers any ability to publicise their views? Indeed, why create the appearance of the existence of non-existent flights? Why offer direct services from Sydney to Santiago that don't exist, or don't perform as advertised, given that that's only going to cause trouble?
By far the most likely scenario is that the flights do exist, and take the advertised twelve and half hours to make the trip. That would explain the lack of complaints. Of course, that's a problem for the flat-earth theory.