How about todays DFW-BNE-SYD QF8? Ordinarily due into SYD at 08:05 (Wed) Now arriving 15:10 (Wed)
For whatever reason QF is now operating the flight DFW-LAX-AKL-BNE-SYD
This is the sort of obvious screw up that makes QF a second class airline.
It diverted to LAX for a medical emergency, and crew limitations meant transferring pax onto other flights and swapping crews etc. Hardly a screw up, rather a plan for getting pax to their destinations.