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

Return flights

03 Dec - 23 Jan	Hawaiian Airlines
05 Dec - 21 Jan	Hawaiian Airlines
05 Dec - 12 Dec	Alaska Airlines
07 Dec - 08 Jan	Hawaiian Airlines
08 Dec - 12 Jan	Alaska Airlines
14 Dec - 28 Dec	Alaska Airlines
17 Dec - 07 Jan	Alaska Airlines
14 Dec - 31 Dec	Alaska Airlines
22 Dec - 17 Jan	Alaska Airlines
23 Dec - 28 Dec	Alaska Airlines
08 Dec - 31 Dec	Alaska Airlines
16 Dec - 31 Dec	Alaska Airlines
16 Dec - 07 Jan	Alaska Airlines
26 Dec - 09 Jan	Alaska Airlines
15 Dec - 15 Jan	Alaska Airlines
16 Dec - 30 Dec	Alaska Airlines
21 Dec - 29 Dec	Alaska Airlines
16 Dec - 06 Jan	Alaska Airlines
17 Dec - 31 Dec	Alaska Airlines
03 Dec - 07 Dec	Qatar Airways

Also check the deals for one-way flights from Oakland to Sydney 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 Oakland to Sydney in December from $890

Return flights