Cheapest return flights from London to Buenos Aires in September from $1183

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

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

Return flights

08 Sep - 29 Sep LATAM Airlines Group
23 Sep - 30 Sep LATAM Airlines Group
22 Sep - 29 Sep LATAM Airlines Group
20 Sep - 27 Sep TAP
24 Sep - 01 Oct Air Canada
17 Sep - 24 Sep Air Canada
09 Sep - 17 Sep Air Canada
15 Sep - 28 Sep British Airways
02 Sep - 16 Sep Iberia
16 Sep - 06 Oct TAP
10 Sep - 17 Sep Air Canada
15 Sep - 24 Sep LATAM Airlines Group
11 Sep - 21 Oct LATAM Airlines Group
25 Sep - 04 Oct British Airways
26 Sep - 05 Oct British Airways
22 Sep - 02 Oct LATAM Airlines Group
24 Sep - 08 Oct LATAM Airlines Group
20 Sep - 10 Oct LATAM Airlines Group

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

Skyscanner

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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