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

Return flights

05 Dec - 13 Dec	Avianca
02 Dec - 01 Jan	Avianca
08 Dec - 01 Jan	Avianca
01 Dec - 06 Dec	Avianca
02 Dec - 09 Dec	Avianca
05 Dec - 11 Dec	Avianca
02 Dec - 10 Dec	Avianca
04 Dec - 11 Dec	Avianca
02 Dec - 11 Dec	Avianca
08 Dec - 15 Dec	Avianca
03 Dec - 13 Dec	Avianca
02 Dec - 17 Dec	Avianca
01 Dec - 01 Jan	Avianca
15 Dec - 08 Jan	Copa
16 Dec - 06 Jan	Copa
05 Dec - 07 Jan	Copa
19 Dec - 07 Jan	Copa
25 Dec - 01 Jan	Copa
06 Dec - 10 Jan	LATAM Airlines Group
24 Dec - 08 Jan	Copa

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.

Book a cheap hotel in San Jose

Cheap car rent in San Jose

Cheapest return flights from Buenos Aires to San Jose in December from $413

Return flights