The flight from Las Vegas (LAS) to Narita (NRT) takes about 10h 52m nonstop on a widebody airliner, covering 5,500 miles (8,851 km).
Narita is 16 hours ahead of Las Vegas. You cross 16 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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