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

Return flights

14 Aug - 26 Aug	LATAM Airlines Group
14 Aug - 28 Aug	LATAM Airlines Group
21 Aug - 02 Sep	LATAM Airlines Group
16 Aug - 23 Aug	Spirit Airlines
21 Aug - 03 Sep	American Airlines
12 Aug - 28 Aug	Spirit Airlines
14 Aug - 27 Aug	Spirit Airlines
12 Aug - 19 Aug	Spirit Airlines
13 Aug - 26 Aug	Avianca
15 Aug - 27 Aug	Spirit Airlines
04 Aug - 10 Aug	LATAM Airlines Group
04 Aug - 12 Aug	LATAM Airlines Group

Also check the deals for one-way flights from Boston to Lima 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 Lima in August from $453

Return flights