QF 1404 then QF 554 at Sydney
Mildura → Sydney → Brisbane
Timetable, Sydney time
13:25QF 1404 from Mildura at the gate
19:50QF 554 to Brisbane leaves the gate
6 h 25 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 1404 and QF 554 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.