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

Return flights

07 Mar - 21 Mar	Avianca
14 Mar - 23 Mar	Avianca
04 Mar - 19 Mar	Avianca
04 Mar - 15 Mar	Avianca
03 Mar - 14 Mar	Avianca
01 Mar - 15 Mar	Avianca
04 Mar - 21 Mar	Avianca
04 Mar - 11 Mar	Avianca
03 Mar - 24 Mar	Avianca
23 Mar - 30 Mar	Air Canada
25 Mar - 14 Apr	Air Canada
23 Mar - 05 Apr	Air Canada
26 Mar - 12 Apr	Air Canada
27 Mar - 14 Apr	Air Canada
25 Mar - 01 Apr	Air Canada
21 Mar - 01 Apr	LATAM Airlines Group
13 Mar - 11 Apr	LATAM Airlines Group
24 Mar - 01 Apr	LATAM Airlines Group
31 Mar - 08 Apr	LATAM Airlines Group
27 Mar - 24 Apr	LATAM Airlines Group

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 882€

Return flights