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

Return flights

31 Aug - 25 Sep	Avianca
31 Aug - 22 Sep	Avianca
19 Aug - 15 Sep	Air France
31 Aug - 09 Sep	Avianca
26 Aug - 09 Sep	Avianca
19 Aug - 16 Sep	KLM
25 Aug - 17 Sep	Avianca
29 Aug - 23 Sep	Air France
29 Aug - 24 Sep	Air France
30 Aug - 24 Sep	Air France
14 Aug - 17 Aug	Air France
14 Aug - 18 Aug	KLM
24 Aug - 30 Aug	Avianca
25 Aug - 31 Aug	Avianca
18 Aug - 25 Aug	KLM
15 Aug - 17 Aug	Air France
14 Aug - 20 Aug	KLM
13 Aug - 20 Aug	Air France
18 Aug - 22 Aug	SWISS
13 Aug - 21 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 761€

Return flights