The flight from Sepang (KUL) to Madrid (MAD) takes about 12h 37m nonstop on a widebody airliner, covering 6,891 miles (11,090 km).
Madrid is 6 hours behind Sepang. 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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