Cheapest return flights from San Jose to Buenos Aires in September from 436€

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

Return flights

06 Sep - 15 Sep GOL Linhas Aéreas
14 Sep - 20 Sep LATAM Airlines Group
08 Sep - 22 Sep Avianca
06 Sep - 21 Sep Avianca
01 Sep - 25 Sep Avianca
01 Sep - 12 Sep Avianca
04 Sep - 10 Sep Avianca
01 Sep - 11 Sep Avianca
08 Sep - 15 Sep LATAM Airlines Group
02 Sep - 21 Sep Avianca
28 Sep - 24 Oct Avianca

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

Skyscanner

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

Feel free to contact us with any feedback or request another flight research.