Cheapest return flights from London to Buenos Aires in September from $1107

Best time to book flights for London (LON) to Buenos Aires (AEP) flights at AirHint

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

Return flights

16 Sep - 06 Oct Ryanair
23 Sep - 29 Sep TAP
17 Sep - 27 Sep TAP
02 Sep - 16 Sep Ryanair
08 Sep - 29 Sep LATAM Airlines Group
23 Sep - 30 Sep LATAM Airlines Group
20 Sep - 27 Sep TAP
24 Sep - 01 Oct Air Canada
14 Sep - 02 Oct Air Canada
01 Sep - 30 Sep LATAM Airlines Group
09 Sep - 17 Sep Air Canada
04 Sep - 29 Sep LATAM Airlines Group
15 Sep - 22 Sep British Airways
20 Sep - 04 Oct British Airways
08 Sep - 02 Oct LATAM Airlines Group
25 Sep - 04 Oct British Airways
28 Sep - 05 Oct British Airways
27 Sep - 05 Oct British Airways
22 Sep - 02 Oct Vueling Airlines
24 Sep - 08 Oct Vueling Airlines

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

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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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