The flight from Zurich (ZRH) to Dulles (IAD) takes about 8h 15m nonstop on a widebody airliner, covering 4,147 miles (6,673 km).
Dulles is 6 hours behind Zurich. You cross 6 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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