In general, March is the cheapest month to fly from Ireland to Sao Paulo. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around 550€. If you don’t want to visit Sao Paulo in March, then you should wait until February to fly from Ireland, when ticket prices are also cheap, with an average price of 561€.
Most flyers found that booking tickets 52 days in advance of their planned departure date is the best time to get cheap flights to Sao Paulo. During this timeframe, flight prices are around 675€. Keep in mind that you might also find cheap flights to Sao Paulo outside of this time window. In fact, momondo users recently found flights from Ireland to Sao Paulo for 459€.
The cheapest day to depart on your flight to Sao Paulo is on a Wednesday when prices can be found for as low as 579€. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around 702€. These prices are subject to change though, so be sure to set up a Price Alert for flights to Sao Paulo.
Flying to Sao Paulo from Ireland at midday is the least expensive time of day to depart. momondo users have found prices as low as 573€ when looking at flights departing at midday. In contrast, the most expensive time of day to depart to Sao Paulo is in the afternoon when prices are around 677€.