Question : Have you considered flying out of an airport besides Manchester Boston Regional Airport (MHT)?
Answer : Departing from Manchester Boston Regional Airport is not the only way to get to Sao Paulo-Guarulhos International Airport. Try searching for flights from Logan International Airport (BOS) as well. Over the next few months, flights from BOS to GRU are being priced 25% cheaper than flights from MHT to GRU. Being only 44 miles away, it's easily accessible for most.
Question : Is price more important than specific travel days for you?
Answer : The best day to fly on a budget this month is Tuesday. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.
Question : How many days should you spend in Sao Paulo?
Answer : The average time spent in Sao Paulo by passengers from Manchester is 22 days.