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

Return flights

23 Mar - 31 Mar	Avianca
18 Mar - 25 Mar	Copa
09 Mar - 17 Mar	Avianca
06 Mar - 21 Mar	Avianca
11 Mar - 16 Mar	Avianca
14 Mar - 22 Mar	Avianca
13 Mar - 22 Mar	Avianca
10 Mar - 20 Mar	LATAM Airlines Group
08 Mar - 13 Mar	Copa
05 Mar - 18 Mar	Copa
31 Mar - 09 Apr	Copa
30 Mar - 06 Apr	Copa
30 Mar - 13 Apr	Copa
26 Mar - 09 Apr	Copa
31 Mar - 06 Apr	Copa
26 Mar - 05 Apr	Avianca
26 Mar - 13 Apr	Copa
20 Mar - 04 Apr	Copa
28 Mar - 14 Apr	Copa
28 Mar - 13 Apr	Copa

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 $372

Return flights