Originally Posted by Toula

I don't believe that pushing the Sydney departure back by a couple of hours would work. As it is, I believe the flight gets into Sydney about 7.30 p.m. and turns around the same night and departs at 9.30 p.m. back to Honolulu.

You have to remember that Sydney has a curfew from 11 p.m. to 6 am., so pushing the departure from Honolulu back by a couple of hours would likely mean they would not be able to turn around the same night.