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

Return flights

20 May - 04 Jun	Avianca
15 May - 30 May	Avianca
05 May - 23 May	JetSmart
09 May - 30 May	Flybondi
24 May - 07 Jun	GOL Linhas Aéreas
15 May - 24 May	Avianca
11 May - 24 May	GOL Linhas Aéreas
05 May - 20 May	Avianca
18 May - 27 May	Avianca
30 May - 30 Jun	Avianca
01 May - 16 May	JetSmart
01 May - 28 May	Avianca

Also check the deals for one-way flights from Buenos Aires to San Jose in May.

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 May from 512€

Return flights