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

Return flights

28 Sep - 27 Oct	Norse Atlantic Airways (UK)
03 Sep - 05 Sep	Delta
04 Sep - 15 Sep	easyJet
15 Sep - 17 Oct	Air Europa
07 Sep - 28 Sep	Air Europa
15 Sep - 28 Sep	Air Europa
01 Sep - 10 Sep	Norse Atlantic Airways (UK)
19 Sep - 28 Sep	Air Europa
10 Sep - 10 Oct	Vueling Airlines
16 Sep - 30 Sep	Air Europa
07 Sep - 21 Sep	Air Europa
03 Sep - 01 Oct	Air Europa
12 Sep - 26 Sep	Air Europa
06 Sep - 20 Sep	Iberia
23 Sep - 18 Oct	Air Europa
23 Sep - 07 Oct	Vueling Airlines
30 Sep - 07 Oct	Vueling Airlines
26 Sep - 05 Oct	Vueling Airlines
30 Sep - 31 Oct	Vueling Airlines
26 Sep - 13 Oct	Vueling Airlines

Also check the deals for one-way flights from London to Buenos Aires in September.

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 September from $1220

Return flights