Cheapest return flights from Lisbon to Buenos Aires in September from $1026

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

Return flights

13 Sep - 27 Sep LATAM Airlines Group
09 Sep - 28 Sep LATAM Airlines Group
04 Sep - 04 Oct Azul Airlines
22 Sep - 30 Sep LATAM Airlines Group
26 Sep - 11 Oct LATAM Airlines Group
27 Sep - 11 Oct LATAM Airlines Group
19 Sep - 28 Sep LATAM Airlines Group
07 Sep - 28 Sep LATAM Airlines Group
10 Sep - 20 Sep LATAM Airlines Group
26 Sep - 16 Oct TAP
08 Sep - 22 Sep LATAM Airlines Group
07 Sep - 22 Sep LATAM Airlines Group
07 Sep - 20 Sep Azul Airlines
21 Sep - 04 Oct LATAM Airlines Group
02 Sep - 10 Sep Azul Airlines
15 Sep - 06 Oct SWISS
02 Sep - 21 Oct Vueling Airlines

Also check the deals for one-way flights from Lisbon 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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