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

Return flights

23 Sep - 16 Oct	Air France
23 Sep - 12 Oct	Air France
25 Sep - 14 Oct	Air France
21 Sep - 16 Oct	Air France
23 Sep - 18 Oct	Air France
25 Sep - 03 Oct	Air France
19 Sep - 19 Oct	Avianca
25 Sep - 16 Oct	Lufthansa
25 Sep - 21 Oct	Lufthansa
20 Sep - 04 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 712€

Return flights