Cheapest return FRA–SJO flights, September

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

Return flights

17 Sep - 30 Sep Air France
01 Sep - 30 Sep Air France
01 Sep - 03 Oct Air France
17 Sep - 03 Oct Air France
14 Sep - 28 Sep KLM
21 Sep - 12 Oct KLM
15 Sep - 03 Oct KLM
15 Sep - 06 Oct KLM
19 Sep - 06 Oct KLM
24 Sep - 08 Oct KLM
18 Sep - 03 Oct KLM
19 Sep - 03 Oct KLM
28 Sep - 09 Oct KLM
01 Sep - 14 Sep Air France
05 Sep - 29 Sep KLM
12 Sep - 29 Sep KLM
07 Sep - 14 Sep KLM
14 Sep - 27 Sep KLM
11 Sep - 27 Sep KLM
11 Sep - 22 Sep KLM

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

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