The flight from Honolulu, Oahu (HNL) to Seoul (ICN) takes about 9h 1m nonstop on a widebody airliner, covering 4,569 miles (7,353 km).
Seoul is 19 hours ahead of Honolulu, Oahu. You cross 19 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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