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

Return flights

30 Oct - 10 Nov	Ryanair
30 Oct - 09 Nov	Ryanair
30 Oct - 11 Nov	Ryanair
31 Oct - 14 Nov	Ryanair
30 Oct - 20 Nov	Ryanair
29 Oct - 12 Nov	Ryanair
26 Oct - 25 Nov	Ryanair
31 Oct - 15 Nov	Ryanair
27 Oct - 10 Nov	Ryanair
21 Oct - 12 Nov	Ryanair
26 Oct - 31 Oct	Ryanair
23 Oct - 31 Oct	Ryanair
25 Oct - 31 Oct	Ryanair
19 Oct - 24 Oct	Ryanair
14 Oct - 17 Oct	Ryanair
18 Oct - 25 Oct	Ryanair
17 Oct - 24 Oct	Ryanair
15 Oct - 22 Oct	Ryanair
12 Oct - 16 Oct	Ryanair
19 Oct - 26 Oct	Ryanair

Also check the deals for one-way flights from London to Buenos Aires in October.

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 October from $1077

Return flights