AirHint found the following cheapest return flights from San Jose (SJO) to Buenos Aires (AEP) in October 2025 (see full year).

Return flights

09 Oct - 16 Oct	GOL Linhas Aéreas
09 Oct - 15 Oct	GOL Linhas Aéreas
20 Oct - 27 Oct	LATAM Airlines Group
06 Oct - 20 Oct	Avianca
23 Oct - 30 Oct	Avianca
27 Oct - 05 Nov	LATAM Airlines Group
08 Oct - 19 Oct	Avianca
08 Oct - 16 Oct	Avianca
14 Oct - 19 Oct	Avianca
10 Oct - 14 Nov	Avianca
14 Oct - 22 Oct	Avianca
10 Oct - 24 Oct	Avianca
09 Oct - 02 Nov	Avianca
30 Oct - 07 Nov	Avianca
25 Oct - 04 Nov	Avianca
31 Oct - 11 Nov	Avianca
31 Oct - 05 Nov	Avianca
27 Oct - 01 Nov	Copa

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

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 October from 420€

Return flights