Must have been done by now, can you point to a documented journey proving this? Flat earthers would say of course you can sail in a big circle around the known land masses and return to your starting point. Can you fly that?

Must have been done by know, can you point to a documented journey proving this? Flat earthers would say of course you can sail in a big circle around the known land masses and return to your starting point. Can you fly that?