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

Return flights

28 Oct - 25 Nov	Avianca
29 Oct - 09 Nov	Avianca
28 Oct - 11 Nov	LATAM Airlines Group
28 Oct - 04 Nov	LATAM Airlines Group
06 Oct - 20 Oct	Virgin Atlantic
06 Oct - 13 Oct	Virgin Atlantic
27 Oct - 09 Nov	LATAM Airlines Group
06 Oct - 27 Nov	LATAM Airlines Group
07 Oct - 21 Oct	LATAM Airlines Group
07 Oct - 07 Nov	LATAM Airlines Group
07 Oct - 20 Oct	LATAM Airlines Group
11 Oct - 14 Oct	Avianca
11 Oct - 14 Nov	Avianca
12 Oct - 19 Oct	Avianca
27 Oct - 31 Oct	Avianca
11 Oct - 04 Nov	Avianca
27 Oct - 06 Nov	Avianca
02 Oct - 23 Oct	LATAM Airlines Group
11 Oct - 26 Oct	Avianca
16 Oct - 29 Oct	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 $1190

Return flights