Cheapest return flights from San Francisco to Sydney in December from 1389€

Best time to book flights for San Francisco (SFO) to Sydney (SYD) flights at AirHint

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

Return flights

12 Dec - 19 Dec Air Canada
20 Dec - 27 Dec Fiji Airways
12 Dec - 02 Jan Air Canada
12 Dec - 03 Jan Air Canada
20 Dec - 31 Dec Air Canada
22 Dec - 31 Dec Air Canada
19 Dec - 31 Dec Air Canada
17 Dec - 07 Jan Air Canada
05 Dec - 19 Dec United direct
11 Dec - 20 Dec United direct
12 Dec - 19 Dec United direct
25 Dec - 10 Jan Asiana Airlines
22 Dec - 01 Jan Air Canada
31 Dec - 01 Jan ANA

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

Skyscanner

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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