QF 1506 then QF 546 at Sydney
Melbourne → Sydney → Brisbane
Timetable, Sydney time
12:05QF 1506 from Melbourne at the gate
17:45QF 546 to Brisbane leaves the gate
5 h 40 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
QF 1506 and QF 546 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.