QF 1819 then TG 4 at Sydney
Cairns → Sydney → Melbourne
Timetable, Sydney time
10:50QF 1819 from Cairns at the gate
15:45TG 4 to Melbourne leaves the gate
4 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
QF 1819 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.