AirHint found the following cheapest return flights from Boston (BOS) to Sao Paulo (GRU) in October 2025 (see full year).

Return flights

23 Oct - 03 Nov	GOL Linhas Aéreas
11 Oct - 15 Oct	Avianca
01 Oct - 08 Oct	Avianca
26 Oct - 06 Nov	Avianca
31 Oct - 11 Nov	Avianca
09 Oct - 13 Oct	Avianca
01 Oct - 06 Oct	Avianca
15 Oct - 30 Oct	Avianca
31 Oct - 16 Nov	Avianca
20 Oct - 02 Nov	Avianca
09 Oct - 25 Oct	Avianca
23 Oct - 09 Nov	Avianca
10 Oct - 25 Oct	Avianca
27 Oct - 16 Nov	Avianca
25 Oct - 02 Nov	Spirit Airlines
24 Oct - 01 Nov	Spirit Airlines
09 Oct - 25 Oct	LATAM Airlines Group	direct
31 Oct - 16 Nov	LATAM Airlines Group	direct
09 Oct - 19 Oct	LATAM Airlines Group	direct
11 Oct - 22 Oct	LATAM Airlines Group	direct

Also check the deals for one-way flights from Boston to Sao Paulo in October.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Boston to Sao Paulo in October from $478

Return flights