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

Return flights

01 Dec - 15 Dec	Qantas
02 Dec - 09 Dec	Fiji Airways
16 Dec - 23 Dec	Air Canada
24 Dec - 12 Jan	Fiji Airways
27 Dec - 20 Jan	Fiji Airways
05 Dec - 14 Dec	Qantas
03 Dec - 08 Dec	ANA
30 Dec - 13 Jan	Air Canada
27 Dec - 21 Jan	Air Canada
29 Dec - 13 Jan	Air Canada
26 Dec - 18 Jan	Air Canada
25 Dec - 17 Jan	Air Canada
01 Dec - 15 Dec	American Airlines	direct
03 Dec - 19 Dec	United	direct
08 Dec - 12 Jan	United	direct
05 Dec - 14 Dec	United	direct
03 Dec - 08 Dec	United	direct
04 Dec - 16 Jan	United
03 Dec - 12 Dec	United
13 Dec - 11 Jan	Air Canada

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 781€

Return flights