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

Return flights

22 Oct - 29 Oct	Avianca
25 Oct - 04 Nov	Avianca
25 Oct - 03 Nov	Avianca
22 Oct - 27 Oct	Avianca
01 Oct - 22 Oct	Avianca
28 Oct - 20 Nov	Avianca
09 Oct - 23 Oct	Avianca
11 Oct - 22 Oct	Avianca
07 Oct - 21 Oct	Avianca
15 Oct - 19 Oct	Avianca
11 Oct - 20 Oct	Avianca
11 Oct - 21 Oct	Avianca
23 Oct - 01 Nov	Avianca
23 Oct - 02 Nov	Avianca
09 Oct - 19 Oct	Avianca
30 Oct - 12 Nov	LATAM Airlines Group
30 Oct - 21 Nov	LATAM Airlines Group
25 Oct - 02 Nov	Avianca
30 Oct - 10 Nov	LATAM Airlines Group
24 Oct - 02 Nov	Avianca

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 $1141

Return flights