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

Return flights

11 May - 22 May	Avianca
10 May - 20 May	Avianca
04 May - 11 May	Avianca
14 May - 17 May	Avianca
13 May - 20 May	Avianca
11 May - 19 May	Avianca
06 May - 13 May	Avianca
12 May - 02 Jun	Avianca
06 May - 18 May	Avianca
19 May - 09 Jun	Avianca
09 May - 30 May	Wizz Air UK
09 May - 20 May	Wizz Air UK
21 May - 01 Jun	SWISS
01 May - 01 Jun	SWISS
15 May - 07 Jun	Wizz Air UK
30 May - 13 Jun	LATAM Airlines Group
23 May - 06 Jun	LATAM Airlines Group
31 May - 06 Jun	Vueling Airlines
28 May - 06 Jun	SWISS

Also check the deals for one-way flights from London 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 London to Buenos Aires in May from 883€

Return flights