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

Return flights

10 Dec - 17 Dec	Icelandair
25 Dec - 17 Jan	Alaska Airlines
25 Dec - 10 Jan	Alaska Airlines
13 Dec - 25 Dec	Alaska Airlines
25 Dec - 08 Jan	Alaska Airlines
08 Dec - 29 Dec	Condor
24 Dec - 15 Jan	British Airways
11 Dec - 22 Dec	Condor
11 Dec - 04 Jan	Hawaiian Airlines
29 Dec - 10 Jan	Condor
12 Dec - 15 Dec	Alaska Airlines
01 Dec - 18 Dec	Alaska Airlines
15 Dec - 22 Dec	Condor
15 Dec - 29 Dec	Condor
11 Dec - 06 Jan	Condor
12 Dec - 19 Dec	British Airways
12 Dec - 29 Dec	Alaska Airlines
13 Dec - 02 Jan	Lufthansa
17 Dec - 01 Jan	Lufthansa
22 Dec - 05 Jan	Alaska Airlines

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 $870

Return flights