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

Return flights

02 Dec - 09 Dec	Fiji Airways
02 Dec - 10 Dec	Fiji Airways
03 Dec - 08 Dec	Fiji Airways
30 Dec - 20 Jan	Qantas
29 Dec - 19 Jan	Qantas
29 Dec - 27 Jan	Air Canada
23 Dec - 23 Jan	Air Canada
11 Dec - 25 Dec	Air Canada
22 Dec - 14 Jan	Qantas
08 Dec - 15 Dec	Air Canada
01 Dec - 15 Dec	Air Canada
01 Dec - 08 Dec	Qantas	direct
03 Dec - 08 Dec	Qantas	direct
02 Dec - 09 Dec	Qantas	direct
03 Dec - 10 Dec	American Airlines	direct
31 Dec - 18 Jan	United	direct
31 Dec - 31 Jan	United	direct
07 Dec - 17 Jan	United	direct
31 Dec - 25 Jan	United	direct
30 Dec - 17 Jan	United

Also check the deals for one-way flights from Los Angeles 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 Los Angeles to Sydney in December from 630€

Return flights