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

Return flights

02 Sep - 25 Sep	Air France
02 Sep - 19 Sep	Air France
02 Sep - 20 Sep	Air France
06 Sep - 30 Sep	Air France
05 Sep - 26 Sep	Air France
06 Sep - 27 Sep	Air France
07 Sep - 28 Sep	Air France
02 Sep - 09 Sep	Air France
16 Sep - 30 Sep	Air France
26 Sep - 17 Oct	Air France
27 Sep - 18 Oct	Air France
23 Sep - 14 Oct	Air France
25 Sep - 16 Oct	Air France
25 Sep - 21 Oct	Air France
25 Sep - 16 Oct	Lufthansa	direct
16 Sep - 30 Sep	Lufthansa	direct
21 Sep - 11 Oct	Air Canada
27 Sep - 18 Oct	Lufthansa	direct

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

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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Cheapest return flights from San Jose to Frankfurt in September from 716€

Return flights