Cheapest return flights from San Francisco to Sydney in December from $815

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

Return flights

03 Dec - 23 Jan Alaska Airlines
08 Dec - 18 Jan ANA
07 Dec - 14 Dec United direct
01 Dec - 08 Dec United
03 Dec - 08 Dec United direct
08 Dec - 18 Jan United direct
04 Dec - 07 Dec United direct
01 Dec - 15 Dec United
05 Dec - 21 Jan United direct
03 Dec - 23 Jan United direct
03 Dec - 10 Dec United
13 Dec - 20 Jan Hawaiian Airlines
07 Dec - 07 Jan Qantas
28 Dec - 10 Jan Qantas
26 Dec - 17 Jan Qantas
03 Dec - 09 Dec Alaska Airlines
28 Dec - 11 Jan Qantas
08 Dec - 15 Dec Air New Zealand
08 Dec - 31 Dec United direct
02 Dec - 14 Dec Hawaiian Airlines

Also check the deals for one-way flights from San Francisco to Sydney in December.

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