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

Return flights

20 Sep - 01 Oct	Copa
29 Sep - 13 Oct	Iberia
24 Sep - 08 Oct	LATAM Airlines Group
21 Sep - 29 Sep	Avianca
29 Sep - 07 Oct	LATAM Airlines Group
30 Sep - 16 Oct	Iberia
29 Sep - 06 Oct	Iberia
24 Sep - 01 Oct	Iberia
22 Sep - 29 Sep	Iberia
26 Sep - 06 Oct	Iberia
22 Sep - 13 Oct	Iberia
25 Sep - 13 Oct	Iberia
22 Sep - 30 Sep	Iberia
19 Sep - 30 Sep	Iberia
21 Sep - 23 Sep	Iberia
25 Sep - 28 Sep	Air Europa

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

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Buenos Aires to London in September from $1539

Return flights