Thursday 14 February's 1615 hours MEL - SGN, JQ63, was delayed overnight. On Friday 15, B788 VH-VKE has taken off at 1024, so just under 18 hours late.
Also on Friday 15, JQ507 is having a rough trot with A321 VH-VWZ on this scheduled 0825 hours SYD down to MEL not taking off until 1020, so arrival is estimated at 1136, 106 minutes late. This aircraft had arrived in MEL from DRW on JQ677 at 0646, four minutes earloy, but there must have been another A321 fail, as VWZ then found itself on JQ500, the first of the morning's MEL up to SYD at a scheduled 0600 hours.
JQ500 managed to take off at 0803, arriving SYD at 0910, 85 late, and as one can see has lost further time on the next, southbound, sector.
In the other direction, JQ504, the 0810 hours MEL - SYD (A320 VH-VFH) was still taxiing at 1106 hours in MEL, so SYD arrival will be after 1215 hours, so at least 160 minutes late.