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

Return flights

25 Dec - 08 Jan	Condor
03 Dec - 10 Dec	Lufthansa	direct
14 Dec - 24 Dec	Lufthansa	direct
29 Dec - 06 Jan	Air Canada
08 Dec - 15 Dec	Lufthansa	direct
26 Dec - 09 Jan	United	direct
12 Dec - 19 Dec	Air Canada
23 Dec - 30 Dec	Lufthansa
25 Dec - 08 Jan	United	direct
14 Dec - 20 Dec	Air Canada
22 Dec - 29 Dec	Air Canada
29 Dec - 05 Jan	SWISS
13 Dec - 20 Dec	United	direct
18 Dec - 25 Dec	United
22 Dec - 29 Dec	United	direct
22 Dec - 05 Jan	SWISS
19 Dec - 04 Jan	Scandinavian Airlines
19 Dec - 03 Jan	Lufthansa	direct
19 Dec - 04 Jan	Lufthansa	direct
22 Dec - 05 Jan	Lufthansa	direct

Also check the deals for one-way flights from San Francisco 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 Francisco to Frankfurt in December from 620€

Return flights