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

Return flights

28 Oct - 15 Nov	Air Canada
02 Oct - 25 Oct	KLM
21 Oct - 30 Oct	KLM
02 Oct - 21 Oct	KLM
01 Oct - 15 Oct	KLM
01 Oct - 12 Oct	KLM
01 Oct - 14 Oct	KLM
01 Oct - 19 Oct	KLM
16 Oct - 01 Nov	KLM
23 Oct - 01 Nov	KLM
23 Oct - 13 Nov	KLM
24 Oct - 15 Nov	KLM
19 Oct - 01 Nov	KLM
23 Oct - 08 Nov	KLM
28 Oct - 14 Nov	KLM
02 Oct - 24 Oct	KLM
02 Oct - 16 Oct	KLM
21 Oct - 28 Oct	KLM
16 Oct - 06 Nov	KLM
23 Oct - 10 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 $592

Return flights