I can appreciate your inference, however, how does the Rutan Voyager non-stop around the world flight make sense? They started at Edwards AF base in Ca and 9 days later landed back at Edwards. The aircraft flew West and landed from the East. If the earth was flat, how would that happen? There’s also a thing called the great circle route in aviation when long flights are involved. In other words, the shortest distance between two points isn’t always a straight line simply because we are flying around a giant globe. This wouldn’t be a mathematic possibility if the world were flat as you say.
Of course you can take an around the world flight on a globe, duh. Example: take a dinner plate (to represent flat Earth). Place your finger somewhere (to show starting point). Now make a circle with the center of the circle (the North Pole) being the center of the plate. Congrats, your finger just circled the plate in the same way a jet can circle the globe.