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

Return flights

01 Dec - 08 Dec	ANA
31 Dec - 19 Jan	United
01 Dec - 31 Jan	ANA
02 Dec - 12 Dec	Air Canada
10 Dec - 20 Dec	United
06 Dec - 14 Dec	Air Canada
10 Dec - 06 Jan	United
13 Dec - 10 Jan	Alaska Airlines
15 Dec - 28 Jan	United
12 Dec - 10 Jan	jetBlue
25 Dec - 09 Jan	Air Canada
13 Dec - 26 Dec	jetBlue
15 Dec - 09 Jan	Air Canada
28 Dec - 17 Jan	ANA
28 Dec - 16 Jan	Turkish Airlines
16 Dec - 30 Dec	ANA
13 Dec - 27 Dec	Alaska Airlines

Also check the deals for one-way flights from New York 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 New York to Sydney in December from $1074

Return flights