The flight from Honolulu, Oahu (HNL) to Sydney (Mascot) (SYD) takes about 9h 19m nonstop on a widebody airliner, covering 5,077 miles (8,170 km).
Sydney (Mascot) is 20 hours ahead of Honolulu, Oahu. You cross 20 time zones heading east. Eastbound trips like this one tend to be harder to adjust to, so plan for a day or two of jet lag.
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