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

Return flights

04 May - 15 May	Aerolineas Argentinas
12 May - 22 Jun	Aerolineas Argentinas
21 May - 22 Jun	Aerolineas Argentinas
13 May - 27 May	LATAM Airlines Group
28 May - 12 Jun	LATAM Airlines Group
06 May - 26 May	Air Canada
06 May - 17 May	Air Canada
21 May - 09 Jun	Air Canada
28 May - 10 Jun	Air Canada
10 May - 26 May	Avianca
05 May - 18 May	Avianca
05 May - 19 May	Avianca
12 May - 27 May	Avianca
01 May - 20 May	Avianca
08 May - 19 May	Avianca
18 May - 10 Jun	Air Canada
20 May - 02 Jun	Air Canada
16 May - 02 Jun	Air Canada
19 May - 01 Jun	Avianca
15 May - 04 Jun	SWISS

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 $993

Return flights