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

Return flights

09 Mar - 23 Mar	Ryanair
10 Mar - 23 Mar	Ryanair
05 Mar - 19 Mar	Ryanair
03 Mar - 24 Mar	Ryanair
09 Mar - 12 Mar	Ryanair
12 Mar - 19 Mar	Ryanair
12 Mar - 15 Mar	Ryanair
09 Mar - 15 Mar	Ryanair
06 Mar - 13 Mar	Ryanair
07 Mar - 24 Mar	Ryanair
23 Mar - 13 Apr	Ryanair
22 Mar - 28 Apr	Ryanair
24 Mar - 10 Apr	Ryanair
28 Mar - 07 Apr	Ryanair
21 Mar - 10 Apr	Ryanair
20 Mar - 05 Apr	Ryanair
29 Mar - 05 Apr	Ryanair

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 933€

Return flights