The flight from São Paulo (GRU) to London (LHR) takes about 10h 38m nonstop on a widebody airliner, covering 5,878 miles (9,460 km).
London is 4 hours ahead of São Paulo. You cross 4 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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