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

Return flights

21 May - 04 Jun	Lufthansa
20 May - 30 May	Lufthansa
29 May - 15 Jun	Lufthansa
27 May - 15 Jun	Lufthansa
28 May - 15 Jun	Lufthansa
27 May - 14 Jun	Iberia
27 May - 13 Jun	Lufthansa
04 May - 18 May	Air France
14 May - 19 May	Air France
14 May - 23 May	Air France
29 May - 13 Jun	SWISS
05 May - 12 May	SWISS
30 May - 13 Jun	Lufthansa
01 May - 30 Jun	Lufthansa
04 May - 09 May	Lufthansa
16 May - 22 May	Air Europa

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

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 May from $874

Return flights