Cheapest return flights from London to Buenos Aires in September from $1119

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

01 Sep - 29 Sep Lufthansa
01 Sep - 31 Oct SWISS
02 Sep - 30 Oct Lufthansa
02 Sep - 31 Oct Lufthansa
14 Sep - 06 Oct LATAM Airlines Group
01 Sep - 28 Sep Vueling Airlines
03 Sep - 15 Sep Ryanair
01 Sep - 12 Oct SWISS
09 Sep - 28 Sep LATAM Airlines Group
01 Sep - 27 Sep Vueling Airlines
01 Sep - 26 Sep Vueling Airlines
03 Sep - 28 Oct LATAM Airlines Group
25 Sep - 17 Oct LATAM Airlines Group
08 Sep - 21 Sep LATAM Airlines Group
12 Sep - 21 Sep LATAM Airlines Group
12 Sep - 23 Sep LATAM Airlines Group
11 Sep - 26 Sep LATAM Airlines Group
22 Sep - 05 Oct LATAM Airlines Group
26 Sep - 05 Oct LATAM Airlines Group
08 Sep - 04 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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires