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

Return flights

05 Mar - 18 Mar	Air Canada
05 Mar - 11 Mar	Air Canada
04 Mar - 11 Mar	Air Canada
02 Mar - 11 Mar	Air Canada
15 Mar - 30 Mar	Air Canada
01 Mar - 16 Mar	Air Canada
13 Mar - 30 Mar	Air Canada
03 Mar - 17 Mar	Avianca
18 Mar - 08 Apr	Air Canada
01 Mar - 23 Mar	Avianca
01 Mar - 19 Mar	Avianca
08 Mar - 21 Apr	Avianca
21 Mar - 08 Apr	Air Canada
16 Mar - 04 Apr	Air Canada
16 Mar - 07 Apr	Air Europa
25 Mar - 12 Apr	Air Europa
23 Mar - 05 Apr	Air Europa
27 Mar - 03 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 792€

Return flights