AirHint found the following cheapest return flights from Lisbon (LIS) to Buenos Aires (EZE) in August 2025 (see full year).

Return flights

06 Aug - 22 Sep	LATAM Airlines Group
18 Aug - 25 Aug	TAP
19 Aug - 26 Aug	LATAM Airlines Group
11 Aug - 18 Aug	LATAM Airlines Group
06 Aug - 09 Aug	LATAM Airlines Group
12 Aug - 19 Aug	KLM
31 Aug - 07 Sep	Iberia
12 Aug - 01 Sep	LATAM Airlines Group
10 Aug - 17 Aug	Air France
11 Aug - 25 Aug	LATAM Airlines Group
11 Aug - 28 Aug	LATAM Airlines Group
29 Aug - 29 Sep	Iberia For Level
01 Aug - 08 Aug	LATAM Airlines Group
01 Aug - 25 Aug	Iberia

Also check the deals for one-way flights from Lisbon 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 Lisbon to Buenos Aires in August from 1138€

Return flights