The flight from São Paulo (GRU) to Singapore (SIN) takes about 17h 44m nonstop on a widebody airliner, covering 9,939 miles (15,995 km).
Singapore is 11 hours ahead of São Paulo. You cross 11 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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