QF 1511 then QF 37 at Melbourne
Sydney Kingsford Smith → Melbourne → Singapore
Timetable, Melbourne time
17:35QF 1511 from Sydney Kingsford Smith at the gate
16:55QF 37 to Singapore leaves the gate
23 h 20 apart on the timetable, overnight
QF 37 leaves 23 h 20 after QF 1511 arrives on the timetable: more than half a day, so not a connection we count.