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

Return flights

25 Mar - 30 Mar	Avianca
18 Mar - 26 Mar	Avianca
28 Mar - 31 Mar	Avianca
18 Mar - 25 Mar	Avianca
18 Mar - 31 Mar	Avianca
19 Mar - 25 Mar	LATAM Airlines Group
28 Mar - 12 Apr	Avianca
28 Mar - 03 Apr	Avianca
31 Mar - 25 Apr	Avianca
18 Mar - 07 Apr	Avianca
18 Mar - 29 Mar	Avianca
22 Mar - 29 Mar	Avianca
28 Mar - 04 Apr	Avianca
23 Mar - 28 Mar	Avianca
11 Mar - 18 Mar	Copa
29 Mar - 05 Apr	Avianca
29 Mar - 01 Apr	Avianca
23 Mar - 05 Apr	Avianca
30 Mar - 05 Apr	Avianca
24 Mar - 01 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 360€

Return flights