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

Return flights

31 Aug - 28 Sep	Ryanair
26 Aug - 26 Sep	Ryanair
31 Aug - 25 Sep	Ryanair
31 Aug - 07 Sep	Ryanair
26 Aug - 31 Aug	Ryanair
23 Aug - 31 Aug	Ryanair
28 Aug - 07 Sep	Ryanair
14 Aug - 21 Aug	Ryanair
19 Aug - 31 Aug	Ryanair
14 Aug - 18 Aug	Ryanair
20 Aug - 31 Aug	Ryanair
15 Aug - 21 Aug	Ryanair
14 Aug - 16 Aug	Ryanair
19 Aug - 27 Aug	Ryanair
21 Aug - 25 Aug	Ryanair
31 Aug - 14 Sep	Ryanair
11 Aug - 11 Sep	Ryanair
26 Aug - 08 Sep	Ryanair
28 Aug - 14 Sep	Ryanair
17 Aug - 04 Sep	Ryanair

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 910€

Return flights