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

Return flights

23 Oct - 01 Nov	LATAM Airlines Group
10 Oct - 16 Oct	Avianca
18 Oct - 31 Oct	Avianca
04 Oct - 12 Oct	Avianca
02 Oct - 11 Oct	Avianca
11 Oct - 25 Oct	Avianca
04 Oct - 18 Oct	Avianca
02 Oct - 10 Oct	Avianca
02 Oct - 09 Oct	Avianca
03 Oct - 12 Oct	Avianca
01 Oct - 30 Nov	LATAM Airlines Group
08 Oct - 18 Oct	LATAM Airlines Group
23 Oct - 14 Nov	Copa
28 Oct - 05 Nov	Copa
02 Oct - 01 Nov	Avianca
30 Oct - 09 Nov	Avianca
29 Oct - 03 Nov	Copa
19 Oct - 01 Nov	Copa
27 Oct - 10 Nov	Copa
31 Oct - 07 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 $456

Return flights