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

Return flights

07 Dec - 13 Dec	Hawaiian Airlines
09 Dec - 20 Dec	Hawaiian Airlines
11 Dec - 18 Dec	Hawaiian Airlines
10 Dec - 07 Jan	Hawaiian Airlines
22 Dec - 08 Jan	Alaska Airlines
22 Dec - 09 Jan	Alaska Airlines
12 Dec - 23 Dec	Alaska Airlines
14 Dec - 26 Dec	Hawaiian Airlines
16 Dec - 25 Dec	Hawaiian Airlines
19 Dec - 06 Jan	Alaska Airlines
23 Dec - 30 Dec	Qatar Airways
21 Dec - 03 Jan	Alaska Airlines
19 Dec - 01 Jan	Alaska Airlines
15 Dec - 12 Jan	Qatar Airways
22 Dec - 30 Dec	Qatar Airways
16 Dec - 05 Jan	Hawaiian Airlines
27 Dec - 11 Jan	Qatar Airways
26 Dec - 11 Jan	Qatar Airways
21 Dec - 30 Dec	Qatar Airways
18 Dec - 25 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 $1653

Return flights