The flight from Mexico City (MEX) to Sydney (Mascot) (SYD) takes about 14h 40m nonstop on a widebody airliner, covering 8,067 miles (12,983 km).
Sydney (Mascot) is 16 hours ahead of Mexico City. You cross 16 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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