AirHint found the following cheapest return flights from Lisbon (LIS) to Buenos Aires (AEP) in April 2026 (see full year).

Return flights

26 Apr - 15 May	Azul Airlines
11 Apr - 25 Apr	Azul Airlines
28 Apr - 05 May	Azul Airlines
09 Apr - 21 Apr	Azul Airlines
01 Apr - 08 Apr	Ryanair
30 Apr - 20 May	LATAM Airlines Group
11 Apr - 18 Apr	Azul Airlines

Also check the deals for one-way flights from Lisbon to Buenos Aires in April.

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 return flights from Lisbon to Buenos Aires in April from $956

Return flights