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

Return flights

21 Aug - 23 Sep	KLM
26 Aug - 29 Sep	SWISS
22 Aug - 24 Aug	KLM
17 Aug - 24 Aug	KLM
18 Aug - 24 Aug	KLM
19 Aug - 30 Aug	Delta
19 Aug - 24 Aug	KLM
19 Aug - 06 Sep	Delta
28 Aug - 18 Sep	KLM
29 Aug - 18 Sep	KLM
21 Aug - 08 Sep	KLM
21 Aug - 04 Sep	KLM
23 Aug - 18 Sep	KLM
21 Aug - 01 Sep	Delta
25 Aug - 01 Sep	Delta
23 Aug - 30 Aug	Delta
19 Aug - 26 Aug	KLM
28 Aug - 31 Aug	Delta
20 Aug - 24 Aug	KLM
18 Aug - 25 Aug	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 1048€

Return flights