AirHint found the following cheapest return flights from Athens (ATH) to San Jose (SJO) in September 2026 (see full year).
Return flights
| 01 Sep - 20 Sep | Air France | ||
| 10 Sep - 24 Sep | KLM | ||
| 01 Sep - 01 Sep | KLM |
Also check the deals for one-way flights from Athens to San Jose in September.
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