It depends on the time of year, since Sydney observes Daylight Saving Time (DST) but Hawaii does not.
From 16:00 UTC on the day before the first Sunday of April until 16:00 UTC on the day before the first Sunday of October, Sydney (UTC+10/UTC+11) is 20 hours ahead of Hawaii (UTC-10). During the rest of the year, the time difference is 21 hours.
2 AM HAST (in Hawaii) =
10 PM AEST (in Sydney Apr-Oct) =
11 PM AEDT (in Sydney Oct-Apr)
about 18 hours
It is about 17 hours.
It is about 11 hours.
It will be about 8 hours.
5 hours
13 minutes
about 10 hours direct
It takes approximately 9 hours to fly from Honolulu to Tokyo Narita Airport.
8.5 hours
10 hours 45 minutes
The flight is 5 hours.
7 hours