On Saturday 3 June 2017, QF1 was significantly late for the second time this week departing from SYD, which as noted above is pretty unusual. A388 Vh-OQE commenced its pushback at 1753, 123 minutes behind schedule, so estimated DXB arrival has become 0150 hours on Sunday 4, 85 late. Predicted departure is at 0325, 75 minutes late for a forecast LHR arrival of 0755, an hour late.
Friday 2 June's QF2 departed LHR at 2254, 79 minutes late, stopped in DXB on Saturday 3 from 0854 (84 minutes behind schedule) to 1117 (102 late) with Sunday 4 SYD arrival suggested as 0715 hours, 125 minutes late. This should not of itself result in QF11, 7 or 1 running late ex SYD on Sunday, touch wood.
Many thousands of kilometres away, Friday's QF12 B744 VH-OJS left JFK 65 late at 1915 hours in the early evening, arriving in the west coast's LAX at 2156, 56 minutes late. The A388 on the same flight number (QF12) then departed at 2313 hours, 43 minutes late with Sunday 4 June arrival suggested as half an hour late at 0650 hours.
QF16 encountered a huge delay in LAX with VH-OJS only departing five minutes ago as I write, at 0353 hours on Saturday 3. QF suggests it will arrive in BNE 235 minutes late at 1005 on Sunday 4 June, but a final time is not often known until the aircraft has become airborne. This will mean a delayed departure tomorrow morning for QF15 from BNE across the Pacific to 'mpvie city' LAX, as its timetable calls for a 1020 hours commencement of pushback. 1145 or later may be the amended departure time.
In turn, Sunday's QF11 across from LAX to JFK (assuming it is not cancelled) will be highly likely to be more than an hour late departing, and in turn QF12 from JFK on Sunday (and QF12/ QF16 on Sunday night ex LAX) may be late. If worst comes to the worst, QF15 might then be delayed on Tuesday 6 June ex BNE for LAX.
If I recall, Flyerqf has observed that when QF11 is delayed arriving at JFK, QF12 returning (the B744) tends to lose extra time 'on the ground' in the Big Apple. One assumes this is to do with losing its allocated slot.