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

Return flights

07 Mar - 24 Mar	Ryanair
02 Mar - 09 Mar	Avianca
01 Mar - 15 Mar	Avianca
05 Mar - 15 Mar	Avianca
05 Mar - 14 Mar	Avianca
24 Mar - 31 Mar	Avianca
03 Mar - 24 Mar	Avianca
11 Mar - 25 Mar	Avianca
10 Mar - 25 Mar	Avianca
11 Mar - 24 Mar	Avianca
29 Mar - 15 Apr	Avianca
14 Mar - 13 Apr	Ryanair
19 Mar - 06 Apr	LATAM Airlines Group
27 Mar - 13 Apr	Air Canada
25 Mar - 01 Apr	LATAM Airlines Group
23 Mar - 06 Apr	LATAM Airlines Group
31 Mar - 14 Apr	LATAM Airlines Group
26 Mar - 10 Apr	Ryanair
28 Mar - 10 Apr	Ryanair
26 Mar - 13 Apr	Air Canada

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 852€

Return flights