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

Return flights

25 Mar - 08 Apr	LATAM Airlines Group
22 Mar - 07 Apr	LATAM Airlines Group
07 Mar - 14 Mar	LATAM Airlines Group
13 Mar - 22 Mar	Avianca
17 Mar - 31 Mar	Avianca
13 Mar - 20 Mar	Avianca
11 Mar - 22 Mar	Avianca
14 Mar - 21 Mar	Avianca
18 Mar - 05 Apr	Avianca
10 Mar - 22 Mar	Avianca
27 Mar - 11 Apr	Avianca
21 Mar - 05 Apr	Avianca
21 Mar - 04 Apr	Avianca
20 Mar - 29 Mar	Avianca
24 Mar - 28 Mar	Avianca
03 Mar - 12 Mar	Avianca
28 Mar - 01 Apr	Avianca
26 Mar - 06 Apr	Avianca
30 Mar - 07 Apr	Avianca
26 Mar - 04 Apr	Avianca

Also check the deals for one-way flights from San Jose 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 San Jose to Buenos Aires in March from 333€

Return flights