Cheapest return BOS–GRU flights, May

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

Return flights

31 May - 03 Jun Copa
28 May - 18 Jun United
09 May - 18 May Avianca
31 May - 12 Jun Copa
31 May - 13 Jun Copa
31 May - 10 Jun Copa
13 May - 20 May United
12 May - 19 May United
09 May - 12 May United
26 May - 07 Jun Copa
09 May - 12 May LATAM Airlines Group direct
24 May - 07 Jun Delta direct
13 May - 10 Jun Delta
29 May - 11 Jun LATAM Airlines Group
14 May - 30 May Delta
14 May - 31 May Delta
29 May - 12 Jun LATAM Airlines Group
29 May - 31 May LATAM Airlines Group
21 May - 31 May LATAM Airlines Group

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

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