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

Return flights

01 Dec - 08 Dec	KLM
09 Dec - 03 Jan	KLM
02 Dec - 09 Dec	KLM
25 Dec - 17 Jan	KLM
26 Dec - 18 Jan	KLM
23 Dec - 08 Jan	KLM
02 Dec - 09 Dec	Lufthansa	direct
06 Dec - 27 Dec	Air France
06 Dec - 20 Dec	Air Canada
17 Dec - 07 Jan	Air Canada
23 Dec - 08 Jan	Lufthansa	direct
09 Dec - 03 Jan	Lufthansa	direct
25 Dec - 17 Jan	Lufthansa	direct
06 Dec - 27 Dec	Lufthansa	direct
06 Dec - 20 Dec	Lufthansa	direct

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

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 December from 717€

Return flights