AirHint found the following cheapest return flights from Boston (BOS) to Buenos Aires (AEP) in August 2025 (see full year).

Return flights

21 Aug - 04 Sep	Spirit Airlines
06 Aug - 09 Aug	LATAM Airlines Group
17 Aug - 23 Aug	Spirit Airlines
08 Aug - 30 Sep	LATAM Airlines Group
09 Aug - 30 Sep	LATAM Airlines Group
31 Aug - 07 Sep	LATAM Airlines Group
05 Aug - 30 Sep	LATAM Airlines Group
01 Aug - 30 Sep	Aeromexico

Also check the deals for one-way flights from Boston to Buenos Aires in August.

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 Buenos Aires in August from 790€

Return flights