Well according to quantas it's 17hours and 05mins from Sydney to Johannesburg so add 2 hours it should be around 19hours and 05mins :)
Approx 9hrs 30. The flight time is almost the same from BKK to either Bris, Syd or Melb
The average flight time from John F. Kennedy International Airport to Brisbane, Australia is 19 hours, 17 minutes.
About 15 hours direct.
About 9 hours.
2hours45 minutes
About 9 hours.
40 minutes
About 12 hours.
11 hours
About 10 hours
About 3 hours.
About 17 hours.
8 and a half hours.
2 hours
About 9 hours direct.
About 9 hours.