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

Return flights

07 Jan - 23 Jan	Avianca
25 Jan - 11 Feb	Avianca
22 Jan - 10 Feb	Copa
23 Jan - 10 Feb	Copa
21 Jan - 29 Jan	Copa
22 Jan - 29 Jan	Copa
19 Jan - 06 Feb	Copa
20 Jan - 05 Feb	Copa
17 Jan - 27 Jan	Copa
26 Jan - 02 Feb	Copa
19 Jan - 27 Jan	Copa
20 Jan - 27 Jan	Copa
21 Jan - 28 Jan	Copa
01 Jan - 18 Jan	Avianca
20 Jan - 28 Jan	Copa
23 Jan - 02 Feb	Copa
22 Jan - 30 Jan	Copa
16 Jan - 03 Feb	Copa
07 Jan - 07 Feb	Copa
21 Jan - 01 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 $503

Return flights