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

Return flights

26 Dec - 10 Jan	Frontier Airlines
20 Dec - 17 Jan	Frontier Airlines
25 Dec - 06 Jan	Frontier Airlines
26 Dec - 05 Jan	Frontier Airlines
27 Dec - 30 Dec	Condor
21 Dec - 06 Jan	Hawaiian Airlines
23 Dec - 30 Dec	Condor
26 Dec - 04 Jan	Frontier Airlines
22 Dec - 30 Dec	Condor
22 Dec - 27 Dec	Alaska Airlines
27 Dec - 03 Jan	Hawaiian Airlines
26 Dec - 02 Jan	TAP
22 Dec - 05 Jan	Frontier Airlines
23 Dec - 02 Jan	Air France
23 Dec - 30 Dec	Lufthansa	direct
22 Dec - 30 Dec	United	direct
22 Dec - 27 Dec	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 914€

Return flights