The flight from Seoul (ICN) to Frankfurt am Main (FRA) takes about 10h 30m nonstop on a widebody airliner, covering 5,309 miles (8,544 km).
Frankfurt am Main 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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