Flat Earther Dave Weiss's "Flight Routes" Con Job

Dave Weiss's fans will see how easy it is to prove that he's a con man.

Links, in order of appearance:

Video "Stew Peters with Flat Earth Dave"
https://www.youtube.com/watch?v=b6nnmJaA-eg

Video "Shiaswordgirl VS Flat Earth Dave!"
https://www.youtube.com/watch?v=YesCj2o9mto

Great-circle map showing Beijing-Dallas and Beijing-Calgary routes:
https://www.greatcirclemap.com/globe?routes=PEK-DFW%2C+PEK-YYC

Finding great-circle routes by stretching a string on a globe:
https://aerosavvy.com/great-circle-routes/