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

Return flights

29 Oct - 05 Nov	Copa
20 Oct - 03 Nov	Copa
29 Oct - 02 Nov	Copa
29 Oct - 09 Nov	Copa
30 Oct - 06 Nov	LATAM Airlines Group
27 Oct - 16 Nov	LATAM Airlines Group
30 Oct - 08 Nov	LATAM Airlines Group
30 Oct - 06 Nov	Delta	direct
31 Oct - 04 Nov	Delta	direct
31 Oct - 11 Nov	Delta	direct
03 Oct - 19 Oct	LATAM Airlines Group
09 Oct - 25 Oct	LATAM Airlines Group
07 Oct - 14 Oct	Delta
05 Oct - 12 Oct	Delta
16 Oct - 20 Oct	Avianca
04 Oct - 19 Oct	LATAM Airlines Group
11 Oct - 25 Oct	Delta
10 Oct - 24 Oct	Copa
10 Oct - 25 Oct	Copa
10 Oct - 26 Oct	Copa

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 413€

Return flights