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

Return flights

04 May - 20 May	Vueling Airlines
11 May - 17 May	TAP
04 May - 11 May	Air Europa
13 May - 20 May	TAP
09 May - 23 May	Air Europa
11 May - 20 May	Avianca
04 May - 17 May	Avianca
04 May - 18 May	Avianca
04 May - 19 May	Avianca
18 May - 25 May	Avianca
06 May - 04 Jun	Avianca
27 May - 08 Jun	Avianca
24 May - 01 Jun	Avianca
25 May - 09 Jun	Avianca
25 May - 08 Jun	Avianca
25 May - 01 Jun	Avianca
19 May - 09 Jun	Avianca
17 May - 07 Jun	Avianca
26 May - 08 Jun	Avianca
17 May - 06 Jun	Avianca

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 853€

Return flights