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

Return flights

10 Mar - 10 Apr	LATAM Airlines Group
21 Mar - 25 Apr	Avianca
05 Mar - 23 Mar	Avianca
26 Mar - 06 Apr	Avianca
19 Mar - 05 Apr	Avianca
17 Mar - 05 Apr	Avianca
17 Mar - 06 Apr	Avianca
20 Mar - 05 Apr	Avianca
18 Mar - 05 Apr	Avianca
28 Mar - 04 Apr	LATAM Airlines Group
06 Mar - 16 Mar	Flybondi
29 Mar - 05 Apr	JetSmart
09 Mar - 19 Mar	Avianca
07 Mar - 21 Mar	Avianca
01 Mar - 15 Mar	JetSmart
06 Mar - 13 Mar	Avianca
11 Mar - 31 Mar	Aerolíneas Argentinas
07 Mar - 14 Mar	Avianca
05 Mar - 14 Mar	Avianca
01 Mar - 10 Mar	LATAM Airlines Group

Also check the deals for one-way flights from Buenos Aires to San Jose 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 Buenos Aires to San Jose in March from $483

Return flights