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

Return flights

15 Jan - 25 Jan	Avianca
13 Jan - 27 Jan	Avianca
18 Jan - 24 Jan	Avianca
06 Jan - 13 Jan	Avianca
19 Jan - 29 Jan	Avianca
20 Jan - 30 Jan	Copa
06 Jan - 16 Jan	Avianca
01 Jan - 16 Jan	Avianca
02 Jan - 17 Jan	LATAM Airlines Group
20 Jan - 06 Feb	Avianca
08 Jan - 06 Feb	Avianca
19 Jan - 06 Feb	Avianca
26 Jan - 29 Jan	Avianca
20 Jan - 04 Feb	Avianca
08 Jan - 05 Feb	Avianca
25 Jan - 02 Feb	Avianca
08 Jan - 03 Feb	Avianca

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 541€

Return flights