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

Return flights

09 Oct - 29 Oct	Air France
09 Oct - 18 Oct	Air France
09 Oct - 26 Oct	Air France
07 Oct - 20 Oct	Air France
07 Oct - 28 Oct	Air France
07 Oct - 21 Oct	SWISS
28 Oct - 20 Nov	SWISS
01 Oct - 22 Oct	Air France
07 Oct - 01 Nov	SWISS
26 Oct - 14 Nov	Lufthansa
25 Oct - 08 Nov	Lufthansa	direct
16 Oct - 22 Oct	KLM
16 Oct - 31 Oct	KLM
17 Oct - 31 Oct	KLM
21 Oct - 14 Nov	KLM
21 Oct - 13 Nov	KLM
16 Oct - 06 Nov	KLM
27 Oct - 08 Nov	KLM
30 Oct - 20 Nov	KLM
21 Oct - 07 Nov	KLM

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

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 Frankfurt to San Jose in October from 528€

Return flights