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

Return flights

19 May - 28 May	Avianca
05 May - 14 May	Avianca
06 May - 19 May	Avianca
08 May - 09 Jun	Lufthansa
27 May - 11 Jun	Lufthansa
31 May - 09 Jun	British Airways
01 May - 16 Jun	British Airways
25 May - 07 Jun	British Airways
31 May - 10 Jun	British Airways
25 May - 03 Jun	British Airways
13 May - 22 May	Avianca
22 May - 10 Jun	Air France
25 May - 04 Jun	Avianca
01 May - 04 Jun	Lufthansa
06 May - 22 May	Avianca
17 May - 28 May	Lufthansa
03 May - 12 May	Avianca
13 May - 20 May	Air Canada
20 May - 27 May	Air Canada
11 May - 20 May	Air Canada

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 $885

Return flights