In general, when booking your flight to Porto Alegre, September is the cheapest month on average.
Most flyers found that booking flight tickets 60 days in advance of their planned departure date is, on average, the best time to get cheap flights to Porto Alegre.
Most of our users find that booking their departure to Porto Alegre on a Tuesday is the cheapest. Conversely, departing on a Saturday seems to be the most expensive.
In general, when looking for the cheapest flight to Porto Alegre, our data indicates that midday flights are the most cost-effective. evening flights tend to be the most expensive.