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

Return flights

20 Jan - 17 Feb	Copa
27 Jan - 03 Feb	Avianca
23 Jan - 02 Feb	Avianca
05 Jan - 24 Jan	Avianca
17 Jan - 27 Jan	Avianca
19 Jan - 23 Jan	Avianca
04 Jan - 15 Jan	Avianca
01 Jan - 16 Jan	Avianca
19 Jan - 05 Feb	Copa
20 Jan - 06 Feb	Copa
02 Jan - 17 Jan	Avianca
16 Jan - 06 Feb	Copa
19 Jan - 06 Feb	Copa
05 Jan - 11 Jan	Avianca
13 Jan - 27 Jan	Copa
05 Jan - 09 Jan	Avianca
19 Jan - 29 Jan	Copa
19 Jan - 07 Feb	Copa

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

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 January from $531

Return flights