Almost none of them know of the Antarctic treaty which would make commercial flights impossible without the approval of international bureaucracy (multiple organizations). However we fly in the north polar circle so I don't see why weather or environmental concerns should be so much more of a problem in the south polar circle. Commercial jets also commonly fly in -40 to -60 degrees, im not sure what the exact limit is, but I'd like to see a aeronautical engineer explain why antartica is mechanically impossible to fly over.

I've seen a few people show me flights that allegedly skim the coast of Antarctica. Heavy investigation has gone into these flight which make the results untrustworthy. Such as the plane going off global tracking with an assumed position nearly the entire journey. Flights being canceled or unbookable as if they were simply for perception. There are some planes with long range capability that may be able to fake it by going much faster than the average commercial jet and using earth's natural jet stream wind over the ocean north of Antarctica.

This guy often covers how airplane logistics prove flat earth. https://youtu.be/jcA3tEr5fa0