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

Return flights

31 Oct - 09 Nov	TAP
24 Oct - 02 Nov	TAP
13 Oct - 26 Oct	TAP
09 Oct - 13 Oct	TAP
24 Oct - 17 Nov	TAP
01 Oct - 31 Oct	TAP
31 Oct - 17 Nov	TAP
08 Oct - 14 Oct	TAP
11 Oct - 19 Oct	TAP
08 Oct - 12 Oct	TAP
01 Oct - 08 Oct	TAP
06 Oct - 14 Oct	TAP
05 Oct - 14 Oct	TAP
13 Oct - 23 Oct	TAP
30 Oct - 03 Nov	TAP
15 Oct - 04 Nov	TAP
27 Oct - 01 Nov	Avianca
23 Oct - 01 Nov	TAP
02 Oct - 17 Nov	Air Canada
01 Oct - 09 Nov	Air Canada

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 857€

Return flights