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

Return flights

03 Dec - 23 Dec	Hawaiian Airlines
04 Dec - 13 Dec	Hawaiian Airlines
02 Dec - 13 Dec	Hawaiian Airlines
29 Dec - 12 Jan	Korean Air
18 Dec - 06 Jan	Hawaiian Airlines
25 Dec - 31 Dec	Hawaiian Airlines
19 Dec - 29 Dec	Hawaiian Airlines
22 Dec - 26 Dec	Hawaiian Airlines
27 Dec - 27 Jan	Korean Air
25 Dec - 29 Dec	Qatar Airways
27 Dec - 31 Dec	Qatar Airways
17 Dec - 07 Jan	Korean Air
22 Dec - 11 Jan	Korean Air
22 Dec - 07 Jan	Korean Air
14 Dec - 03 Jan	Hawaiian Airlines
18 Dec - 03 Jan	Hawaiian Airlines
24 Dec - 09 Jan	Korean Air
26 Dec - 30 Dec	Qatar Airways
26 Dec - 10 Jan	Korean Air
15 Dec - 19 Dec	Korean Air

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 $1053

Return flights