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

Return flights

29 Sep - 12 Oct	Air Canada
03 Sep - 14 Sep	United
30 Sep - 22 Oct	Avianca
10 Sep - 24 Sep	LATAM Airlines Group
04 Sep - 25 Sep	United
11 Sep - 07 Oct	Avianca
18 Sep - 08 Oct	Avianca
17 Sep - 24 Sep	Avianca
09 Sep - 25 Sep	American Airlines
08 Sep - 29 Sep	Avianca
15 Sep - 28 Sep	Avianca
10 Sep - 28 Sep	Avianca
09 Sep - 24 Sep	Avianca
10 Sep - 23 Sep	Avianca
22 Sep - 13 Oct	United
08 Sep - 23 Oct	Avianca
17 Sep - 17 Oct	LATAM Airlines Group
22 Sep - 03 Oct	Air Canada
26 Sep - 13 Oct	United
22 Sep - 02 Oct	United

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.

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Cheapest return flights from Buenos Aires to London in September from $1230

Return flights