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

Return flights

26 Jan - 02 Feb	Copa
20 Jan - 28 Jan	Copa
22 Jan - 29 Jan	Copa
22 Jan - 05 Feb	United
23 Jan - 19 Feb	United
24 Jan - 31 Jan	Copa
23 Jan - 07 Feb	Copa
24 Jan - 08 Feb	Copa
23 Jan - 06 Feb	Copa
29 Jan - 05 Feb	Copa
29 Jan - 08 Feb	Copa
30 Jan - 06 Feb	Copa
29 Jan - 08 Feb	LATAM Airlines Group	direct
22 Jan - 29 Jan	LATAM Airlines Group	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 $425

Return flights