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

Return flights

29 Oct - 06 Nov	Avianca
29 Oct - 12 Nov	Avianca
28 Oct - 10 Nov	Avianca
28 Oct - 05 Nov	Avianca
29 Oct - 11 Nov	Avianca
28 Oct - 04 Nov	Avianca
29 Oct - 08 Nov	Avianca
06 Oct - 19 Oct	Virgin Atlantic
28 Oct - 31 Oct	Avianca
29 Oct - 10 Nov	Avianca
06 Oct - 12 Oct	Air France
26 Oct - 31 Oct	Avianca
27 Oct - 03 Nov	Avianca
27 Oct - 08 Nov	Avianca
09 Oct - 23 Oct	LATAM Airlines Group
09 Oct - 25 Oct	LATAM Airlines Group
12 Oct - 27 Oct	Avianca
09 Oct - 14 Oct	LATAM Airlines Group
09 Oct - 20 Oct	LATAM Airlines Group
12 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 930€

Return flights