I'm assuming that the distance from North to South pole is the same for FE and RE.
Sydney to the North pole is ~8500 miles, and North pole to Santiago is another 8500 miles. Therefore Sydney to Santiago is 17000 miles.
Qantas fly direct from Sydney to Santiago in 12hr 40 mins, which means that Jumbo Jets can cruise at mach 2 for over 12 hours without afterburners.
Oddly they can't match this performance when flying from New York to London.
In REaliTy the distance is about 7000 miles and Jumbos cruise at a more realistic 550mph.