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

Return flights

22 Aug - 30 Aug	Delta
15 Aug - 20 Aug	KLM
22 Aug - 27 Aug	SWISS
29 Aug - 10 Sep	SWISS
27 Aug - 03 Sep	KLM
16 Aug - 16 Sep	KLM
28 Aug - 07 Sep	KLM
31 Aug - 26 Sep	KLM
27 Aug - 07 Sep	KLM
22 Aug - 31 Aug	KLM
16 Aug - 30 Aug	KLM
19 Aug - 02 Sep	KLM
19 Aug - 01 Sep	KLM
18 Aug - 31 Aug	KLM
17 Aug - 04 Sep	KLM
11 Aug - 19 Aug	KLM
19 Aug - 29 Aug	KLM
23 Aug - 31 Aug	KLM
07 Aug - 17 Aug	KLM
31 Aug - 25 Sep	KLM

Also check the deals for one-way flights from London 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 London to Buenos Aires in August from $1385

Return flights