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

Return flights

08 Dec - 22 Dec	Air France
08 Dec - 20 Jan	Air France
05 Dec - 09 Dec	Air Canada
12 Dec - 17 Jan	Air Canada
10 Dec - 25 Dec	Air Canada
05 Dec - 15 Jan	Air Canada
04 Dec - 15 Jan	Air Canada
15 Dec - 16 Jan	Air Canada
11 Dec - 29 Jan	Air Canada
15 Dec - 15 Jan	Air Canada
10 Dec - 24 Dec	KLM
10 Dec - 28 Dec	KLM
02 Dec - 16 Dec	Air Canada
02 Dec - 25 Dec	Lufthansa
04 Dec - 16 Dec	Air Canada
02 Dec - 06 Dec	United
02 Dec - 11 Dec	United
08 Dec - 12 Jan	United
03 Dec - 11 Jan	United
15 Dec - 12 Jan	Air Canada

Also check the deals for one-way flights from Frankfurt to San Jose 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 Frankfurt to San Jose in December from 524€

Return flights