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

Return flights

13 Mar - 22 Mar	ITA Airways
09 Mar - 19 Mar	ITA Airways
03 Mar - 18 Mar	ITA Airways
08 Mar - 23 Mar	ITA Airways
09 Mar - 15 Mar	ITA Airways
09 Mar - 17 Mar	ITA Airways
12 Mar - 22 Mar	ITA Airways
04 Mar - 18 Mar	ITA Airways
12 Mar - 16 Mar	ITA Airways
11 Mar - 25 Mar	ITA Airways
31 Mar - 15 Apr	SWISS
31 Mar - 08 Apr	SWISS
31 Mar - 11 Apr	SWISS
11 Mar - 01 Apr	KLM
29 Mar - 06 Apr	Iberia
19 Mar - 06 Apr	SWISS
31 Mar - 09 Apr	SWISS
12 Mar - 01 Apr	SWISS

Also check the deals for one-way flights from London to Buenos Aires in March.

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 March from $1133

Return flights