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

Return flights

03 Mar - 12 Mar	Avianca
05 Mar - 14 Mar	Avianca
09 Mar - 18 Mar	Avianca
11 Mar - 20 Mar	Avianca
15 Mar - 24 Mar	Avianca
03 Mar - 13 Mar	Avianca
09 Mar - 19 Mar	Avianca
15 Mar - 25 Mar	Avianca
01 Mar - 10 Mar	Avianca
17 Mar - 26 Mar	LATAM Airlines Group
22 Mar - 07 Apr	LATAM Airlines Group
22 Mar - 08 Apr	LATAM Airlines Group
22 Mar - 05 Apr	LATAM Airlines Group
21 Mar - 05 Apr	LATAM Airlines Group
30 Mar - 06 Apr	LATAM Airlines Group
14 Mar - 24 Apr	LATAM Airlines Group
07 Mar - 12 Apr	LATAM Airlines Group
21 Mar - 06 Apr	Air Canada
22 Mar - 06 Apr	Air Canada
26 Mar - 06 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 $1005

Return flights