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

Return flights

01 Oct - 31 Oct	ITA Airways
31 Oct - 15 Nov	SWISS
08 Oct - 27 Oct	ITA Airways
08 Oct - 28 Oct	KLM
08 Oct - 29 Oct	KLM
06 Oct - 27 Oct	ITA Airways
23 Oct - 05 Nov	SWISS
23 Oct - 12 Nov	SWISS
23 Oct - 01 Nov	SWISS
16 Oct - 22 Oct	Delta
10 Oct - 19 Oct	Lufthansa
10 Oct - 20 Oct	Lufthansa
20 Oct - 25 Oct	Delta
24 Oct - 03 Nov	ITA Airways
13 Oct - 27 Oct	KLM
13 Oct - 04 Nov	KLM
29 Oct - 12 Nov	KLM
29 Oct - 09 Nov	KLM
27 Oct - 12 Nov	KLM
31 Oct - 09 Nov	KLM

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 $1311

Return flights