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

Return flights

04 May - 11 May	Avianca
13 May - 20 May	Avianca
11 May - 25 May	Avianca
14 May - 28 May	Avianca
14 May - 17 May	Avianca
11 May - 28 May	Avianca
04 May - 14 May	Avianca
02 May - 20 May	Avianca
09 May - 20 May	Avianca
16 May - 24 May	Avianca
26 May - 09 Jun	Iberia
18 May - 01 Jun	Wizz Air UK
25 May - 05 Jun	Ryanair
24 May - 03 Jun	Wizz Air UK
01 May - 01 Jun	LATAM Airlines Group

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 879€

Return flights