The flight from Los Angeles (LAX) to Sydney (Mascot) (SYD) takes about 13h 37m nonstop on a widebody airliner, covering 7,494 miles (12,061 km).
Sydney (Mascot) is 17 hours ahead of Los Angeles. You cross 17 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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