NZ 112 then QF 497 at Sydney
Auckland → Sydney → Melbourne
Timetable, Sydney time
17:40NZ 112 from Auckland at the gate
21:00QF 497 to Melbourne leaves the gate
3 h 20 apart on the timetable
Sydney’s board shows about 68% of departures at their timetable time, so delays of a few minutes don’t show here.
The last days
NZ 112 and QF 497 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.