HX 17 then TG 4 at Sydney
Hong Kong → Sydney → Melbourne
Timetable, Sydney time
11:05HX 17 from Hong Kong at the gate
15:45TG 4 to Melbourne leaves the gate
4 h 40 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
HX 17 and TG 4 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.