Cheapest return SJO–IST flights, September

AirHint found the following cheapest return flights from San Jose (SJO) to Istanbul (IST) in September 2026 (see full year).

Return flights

15 Sep - 23 Sep Aeromexico
29 Sep - 12 Oct KLM
30 Sep - 12 Oct Air France
14 Sep - 09 Oct Air France
11 Sep - 03 Oct KLM
11 Sep - 12 Oct KLM
16 Sep - 07 Oct KLM
11 Sep - 20 Sep KLM
11 Sep - 05 Oct KLM
10 Sep - 19 Sep KLM

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

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