If the earth were flat, all long distance flights would work on a flat map. Long distance flights do not work on a flat map, therefore the earth isn’t flat.

Where’s Wally’s analysis of Greater Sapien’s flight from Sydney to Johannesburg:

 

These regular flights in the southern hemisphere are impossible on a flat earth:

• QF63/QF64 Sydney – Johannesburg
• SA222/SA223 Johannesburg – São Paulo
• QF27/QF28 Sydney – Santiago
• LA800/LA801 Auckland – Santiago
• SA280/SA281 Perth – Johannesburg
• ANZ30/ANZ31 Auckland – Buenos Aires

 

Flat earthers may try to deflect and show non-direct flights which usually involve transferring to another plane.  This is just deception.  If the earth is flat these flights would follow a different route and be two to three times as long.  If they follow the same route but just on flat earth, the distances would be 3-6 times as long.

Flattys, don’t like it?  Book the flight, take your GPS recorder, and disprove it.  Until then, the flat earth idea is low-quality fan-fiction.

Flight QF27 on flat earth:

Flight QF27 on the globe:

Calculated flight distances on flat earth and globe:

Here’s an example of a real flight that was flown:

 

Here’s a nice graphical illustration of how flights on flat earth cannot work: