The flight from Seoul (ICN) to Zurich (ZRH) takes about 10h 44m nonstop on a widebody airliner, covering 5,433 miles (8,744 km).
Zurich is 7 hours behind Seoul. You cross 7 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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