There are many non-stop long-haul flight routes between two locations in the southern hemisphere, all without crossing the northern hemisphere. These routes can only exist if Earth is a sphere.
Some flat-Earthers claim there is no non-stop long-haul flights between two locations in the southern hemisphere. Flights need to make a stop in a location in the northern hemisphere because the distance will be too far and such flight will traverse the northern hemisphere, or more accurately, the center of the Earth according to their model. They are wrong. There are many such flight routes.
It is easy to prove their assumption is wrong. We can easily find these flights between two locations in the southern hemisphere. These flights are long-haul (between two places on the different continents) and non-stop.
- Sydney, Australia – Johannesburg, South Africa
- Sydney, Australia – Santiago, Chile
- Perth, Australia – Johannesburg, South Africa
- Auckland, New Zealand – Santiago, Chile
- Auckland, New Zealand – Buenos Aires, Argentina
- Melbourne, Australia – Santiago, Chile
- Sydney, Australia – Buenos Aires, Argentina (route no longer operational)
- Johannesburg, South Africa – São Paulo, Brazil
We can easily verify the facts using any travel booking websites. Or we can search Google using a keyword like “flight from Sydney to Santiago.”