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

Return flights

15 Mar - 29 Mar	Air Canada
03 Mar - 18 Mar	Air Canada
02 Mar - 11 Mar	Air Canada
05 Mar - 19 Mar	Air Canada
25 Mar - 14 Apr	Air Canada
07 Mar - 21 Mar	LATAM Airlines Group
04 Mar - 11 Mar	LATAM Airlines Group
07 Mar - 18 Mar	LATAM Airlines Group
09 Mar - 18 Mar	LATAM Airlines Group
13 Mar - 28 Mar	LATAM Airlines Group
09 Mar - 16 Mar	LATAM Airlines Group
09 Mar - 13 Apr	LATAM Airlines Group
30 Mar - 05 Apr	LATAM Airlines Group
18 Mar - 01 Apr	LATAM Airlines Group
31 Mar - 19 Apr	Iberia
27 Mar - 09 Apr	LATAM Airlines Group
29 Mar - 09 Apr	LATAM Airlines Group
26 Mar - 12 Apr	LATAM Airlines Group
28 Mar - 10 Apr	Air Canada
20 Mar - 10 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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from London to Buenos Aires in March from $1080

Return flights