The flight from Hong Kong (HKG) to Detroit (DTW) takes about 13h 7m nonstop on a widebody airliner, covering 7,844 miles (12,624 km).
Detroit is 12 hours behind Hong Kong. You cross 12 time zones heading west. Westbound trips like this one are usually a little easier to adjust to, so plan for a day or two of jet lag.
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