In general, when booking your flight to Sao Paulo, March is the cheapest month on average.
Most flyers found that booking flight tickets 52 days in advance of their planned departure date is, on average, the best time to get cheap flights to Sao Paulo.
On average, the cheapest flights to Sao Paulo are found when departing on a Wednesday. Try to avoid departing on a Sunday, as this is usually the most expensive day.
Generally, when visiting Sao Paulo, midday flights represent the best value. afternoon flights are likely to have higher prices.