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

Return flights

11 Mar - 19 Mar	Copa
09 Mar - 19 Mar	Copa
02 Mar - 10 Mar	Copa
11 Mar - 17 Mar	Copa
10 Mar - 17 Mar	Copa
09 Mar - 17 Mar	Copa
23 Mar - 26 Mar	Copa
25 Mar - 28 Mar	Copa
19 Mar - 28 Mar	Copa
20 Mar - 29 Mar	Copa
11 Mar - 15 Apr	Copa
09 Mar - 15 Apr	Copa
15 Mar - 23 Apr	Copa
11 Mar - 08 Apr	Copa
17 Mar - 07 Apr	Copa
25 Mar - 14 Apr	Copa
10 Mar - 09 Apr	Copa
03 Mar - 10 Apr	Avianca
02 Mar - 13 Apr	Copa
04 Mar - 15 Apr	Copa

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

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 March from 328€

Return flights