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

Return flights

14 Oct - 20 Oct	Ryanair
14 Oct - 04 Nov	Ryanair
14 Oct - 19 Oct	Ryanair
13 Oct - 04 Nov	Ryanair
31 Oct - 09 Nov	Ryanair
13 Oct - 20 Oct	Ryanair
11 Oct - 14 Nov	easyJet
11 Oct - 21 Oct	Ryanair
31 Oct - 03 Nov	Ryanair
20 Oct - 11 Nov	Ryanair
13 Oct - 19 Oct	Ryanair
10 Oct - 14 Oct	Ryanair
10 Oct - 31 Oct	Ryanair
11 Oct - 18 Oct	easyJet
21 Oct - 11 Nov	Ryanair
20 Oct - 26 Oct	Ryanair
31 Oct - 07 Nov	Norse Atlantic Airways (UK)
09 Oct - 04 Nov	Norse Atlantic Airways (UK)
28 Oct - 24 Nov	Avianca
09 Oct - 20 Oct	Norse Atlantic Airways (UK)

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 $928

Return flights