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

One-Way flights

21 Sep	JetSmart
27 Sep	LATAM Airlines Group
29 Sep	Flybondi
30 Sep	JetSmart
24 Sep	Aerolineas Argentinas
22 Sep	LATAM Airlines Group
23 Sep	LATAM Airlines Group
16 Sep	Flybondi
05 Sep	LATAM Airlines Group
07 Sep	LATAM Airlines Group

Also check the deals for return flights from Buenos Aires to Lisbon 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 one-way flights from Buenos Aires to Lisbon in September from 564€

One-Way flights