QF 1996 then JQ 538 at Melbourne
Williamtown → Melbourne → Sydney Kingsford Smith
Timetable, Melbourne time
12:35QF 1996 from Williamtown at the gate
20:50JQ 538 to Sydney Kingsford Smith leaves the gate
8 h 15 apart on the timetable
The last days
QF 1996 and JQ 538 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.