The flight from São Paulo (GRU) to Las Vegas (LAS) takes about 11h 6m nonstop on a widebody airliner, covering 6,078 miles (9,782 km).
Las Vegas is 4 hours behind São Paulo. You cross 4 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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