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

Return flights

28 May - 16 Jun	Lufthansa
20 May - 27 May	Air Canada
06 May - 18 May	Air Canada
05 May - 09 Jun	SWISS
19 May - 19 Jun	SWISS
01 May - 01 Jun	Lufthansa
01 May - 30 May	Air Europa
01 May - 17 May	LATAM Airlines Group
10 May - 16 May	Azul Airlines
06 May - 13 May	Iberia
01 May - 05 Jun	Iberia

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 711€

Return flights