The flight from Madrid (MAD) to Dulles (IAD) takes about 7h 36m nonstop on a widebody airliner, covering 3,806 miles (6,125 km).
Dulles is 6 hours behind Madrid. 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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