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

Return flights

22 Aug - 22 Sep	Air France
23 Aug - 22 Sep	Air France
22 Aug - 07 Sep	Air France
24 Aug - 25 Sep	Avianca
28 Aug - 24 Sep	Avianca
28 Aug - 25 Sep	Avianca
31 Aug - 26 Sep	Avianca
29 Aug - 26 Sep	Norse Atlantic Airways (UK)
15 Aug - 18 Aug	Air France
18 Aug - 18 Sep	Avianca
29 Aug - 28 Sep	Avianca
14 Aug - 20 Aug	Air France
22 Aug - 24 Aug	Air France
12 Aug - 17 Aug	KLM
21 Aug - 25 Aug	Norse Atlantic Airways (UK)
19 Aug - 29 Aug	Delta
21 Aug - 30 Aug	Delta
22 Aug - 30 Aug	Delta
20 Aug - 29 Aug	Delta
22 Aug - 25 Aug	Air France

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 761€

Return flights