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

Return flights

28 Aug - 04 Sep	Ryanair
28 Aug - 01 Sep	Ryanair
27 Aug - 03 Sep	easyJet
28 Aug - 31 Aug	Ryanair
29 Aug - 15 Sep	easyJet
28 Aug - 11 Sep	easyJet
25 Aug - 31 Aug	Ryanair
29 Aug - 31 Aug	Ryanair
21 Aug - 31 Aug	Ryanair
18 Aug - 31 Aug	Ryanair
15 Aug - 02 Sep	easyJet
13 Aug - 17 Aug	easyJet
07 Aug - 22 Aug	Ryanair
27 Aug - 31 Aug	easyJet
30 Aug - 14 Sep	easyJet
16 Aug - 06 Sep	easyJet
14 Aug - 24 Aug	Ryanair
19 Aug - 07 Sep	easyJet
07 Aug - 23 Aug	Ryanair
17 Aug - 02 Sep	easyJet

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 1142€

Return flights