JQ 577 then JQ 516 at Melbourne
Brisbane → Melbourne → Sydney Kingsford Smith
Timetable, Melbourne time
00:10JQ 577 from Brisbane at the gate
11:40JQ 516 to Sydney Kingsford Smith leaves the gate
11 h 30 apart on the timetable
The last days
JQ 577 and JQ 516 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.