JQ 28 then QF 1513 at Sydney
Phuket → Sydney → Melbourne
Timetable, Sydney time
10:50JQ 28 from Phuket at the gate
14:45QF 1513 to Melbourne leaves the gate
3 h 55 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
JQ 28 and QF 1513 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.