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

Return flights

04 Dec - 08 Dec	LATAM Airlines Group
07 Dec - 13 Dec	Flybondi
15 Dec - 15 Jan	LATAM Airlines Group
03 Dec - 10 Dec	Flybondi
04 Dec - 09 Dec	LATAM Airlines Group
09 Dec - 15 Dec	Sky Airline
23 Dec - 02 Jan	Sky Airline
03 Dec - 19 Dec	Flybondi
03 Dec - 18 Dec	Flybondi
02 Dec - 13 Dec	LATAM Airlines Group
08 Dec - 11 Dec	Flybondi
04 Dec - 15 Dec	LATAM Airlines Group
29 Dec - 13 Jan	Sky Airline
01 Dec - 15 Jan	Sky Airline
27 Dec - 09 Jan	Flybondi
28 Dec - 04 Jan	JetSmart
28 Dec - 08 Jan	JetSmart
25 Dec - 11 Jan	LATAM Airlines Group
25 Dec - 09 Jan	Aerolíneas Argentinas
27 Dec - 17 Jan	Flybondi

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

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 December from $613

Return flights