The flight from Detroit (DTW) to Hong Kong (HKG) takes about 15h 24m nonstop on a widebody airliner, covering 7,844 miles (12,624 km).
Hong Kong is 12 hours ahead of Detroit. You cross 12 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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