QF 509 then QF 2064 at Sydney
Brisbane → Sydney → Ballina
Timetable, Sydney time
09:25QF 509 from Brisbane at the gate
13:55QF 2064 to Ballina leaves the gate
4 h 30 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 509 and QF 2064 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.