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

Return flights

01 Dec - 09 Dec	TAP
01 Dec - 06 Dec	Scandinavian Airlines
05 Dec - 10 Dec	TAP
12 Dec - 26 Dec	TAP
07 Dec - 14 Dec	Scandinavian Airlines
02 Dec - 09 Dec	Brussels Airlines
02 Dec - 09 Dec	Lufthansa	direct
03 Dec - 10 Dec	Lufthansa	direct
01 Dec - 09 Dec	Lufthansa	direct
05 Dec - 10 Dec	Lufthansa	direct
18 Dec - 10 Jan	United
13 Dec - 03 Jan	TAP
19 Dec - 05 Jan	Condor
23 Dec - 03 Jan	Lufthansa	direct
20 Dec - 03 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.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt

Cheapest return flights from San Francisco to Frankfurt in December from $607

Return flights