The flight from Atlanta (ATL) to Sepang (KUL) takes about 17h 56m nonstop on a widebody airliner, covering 9,891 miles (15,919 km).
Sepang is 12 hours ahead of Atlanta. 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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