AirHint found the following cheapest return flights from Boston (BOS) to Sao Paulo (GRU) in January 2026 (see full year).

Return flights

21 Jan - 04 Feb	Delta
20 Jan - 26 Jan	Delta
22 Jan - 05 Feb	Delta
16 Jan - 28 Jan	Copa
23 Jan - 06 Feb	Copa
14 Jan - 25 Jan	Copa
14 Jan - 26 Jan	Copa
16 Jan - 19 Feb	LATAM Airlines Group
16 Jan - 20 Feb	Delta
15 Jan - 19 Feb	Avianca
17 Jan - 20 Feb	Delta
14 Jan - 24 Jan	United
17 Jan - 21 Feb	Delta
02 Jan - 09 Jan	Spirit Airlines
02 Jan - 07 Jan	Spirit Airlines
01 Jan - 08 Jan	Copa
02 Jan - 14 Jan	GOL Linhas Aéreas
02 Jan - 07 Jan	Delta	direct

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

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 January from 438€

Return flights