Our favorite Flat Earther claims that the distance between the two cities is:

my calc: Distance between Sydney and Santiago is 11,246km on globe and 14,169km on FE map.

A direct flight from Sydney to Santiago takes 12.5 hours

That means that the plane would have to fly at Mach 1.13 the whole time.

Flight QF 27 is currently en route flying 925 km/hr

https://flightaware.com/live/flight/QFA27

Can any Flat Earther explain how it can make the claimed distance in 12.5 hours?

Edit: note how the flat earthers show up here but as predicted, cannot provide any explanation. As usual.