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

Return flights

24 Jan - 11 Feb	Copa
24 Jan - 10 Feb	Avianca
17 Jan - 27 Jan	Copa
22 Jan - 09 Feb	Copa
22 Jan - 06 Feb	Copa
22 Jan - 05 Feb	Copa
22 Jan - 27 Jan	Copa
21 Jan - 11 Feb	Copa
21 Jan - 06 Feb	Copa
21 Jan - 04 Feb	Copa
24 Jan - 03 Feb	Avianca
21 Jan - 05 Feb	Copa
12 Jan - 27 Jan	Copa
21 Jan - 28 Jan	Copa
18 Jan - 27 Jan	Copa
13 Jan - 20 Jan	Avianca
18 Jan - 24 Jan	Copa
21 Jan - 24 Jan	Copa
13 Jan - 24 Jan	Copa
12 Jan - 22 Jan	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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from San Jose to Buenos Aires in January from 349€

Return flights