The flight from Dulles (IAD) to Beijing (PEK) takes about 13h 35m nonstop on a widebody airliner, covering 6,905 miles (11,113 km).
Beijing is 12 hours ahead of Dulles. You cross 12 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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