The 1525 hours MEL - CBR, QF818, a Sunday afternoon flight beloved of Federal politicians when the Parliament is about to sit, took off on Sunday 9 October at 1729 with arrival suggested as 1814 instead of 1630. VH-VXN is the B738.
The 1530 hours MEL - SYD, QF444, took off at 1748 and so should arrive at about 1856, 121 minutes late. VH-XZC is the B738.
Shwoing the random nature of delays - one can be 'lucky' and be two hours late, or 'unlucky' and more than four hours late - the 1300 hours MEL - SYD (QF434) is behind QF444, with 434 taking off at 1755 for a likely at gate in SYD arrival time of 1910, an extraordinary 285 minutes late.
QF446 (1600 hours MEL - SYD) was airborne at 1612 with a 121 minute late arrival also predicted (1926 hours) - VH-VZL is the B738.
Delays are occurring in the opposite direction as well, with QF447 (1600 hours SYD to MEL) taking off at 1701: arrival is expected at 1838, 63 minutes tardy. VH-VXL is the conveyance.