Cheapest return flights from Buenos Aires to San Jose in December from $598

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

Return flights

24 Dec - 04 Jan Avianca
24 Dec - 03 Jan Avianca
25 Dec - 11 Jan Avianca
30 Dec - 07 Jan Avianca
28 Dec - 05 Jan Avianca
29 Dec - 26 Jan Avianca
22 Dec - 19 Jan LATAM Airlines Group
25 Dec - 10 Jan Avianca
10 Dec - 14 Dec Aerolineas Argentinas

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

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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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