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

Return flights

06 May - 20 May	Air Canada
04 May - 19 May	LATAM Airlines Group
04 May - 15 May	LATAM Airlines Group
20 May - 08 Jun	LATAM Airlines Group
13 May - 27 May	Avianca
20 May - 31 May	LATAM Airlines Group
04 May - 20 May	LEVEL
04 May - 18 May	LEVEL
08 May - 20 May	LEVEL
04 May - 23 May	LEVEL
08 May - 16 May	LEVEL
24 May - 05 Jun	LEVEL
27 May - 11 Jun	Avianca
28 May - 17 Jun	Avianca
26 May - 05 Jun	LEVEL
24 May - 13 Jun	Plus Ultra Lineas Aereas
13 May - 02 Jun	Avianca
20 May - 07 Jun	Avianca
23 May - 05 Jun	LEVEL
25 May - 11 Jun	Avianca

Also check the deals for one-way flights from Buenos Aires to Lisbon 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 Buenos Aires to Lisbon in May from 821€

Return flights