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

Return flights

07 Dec - 21 Dec	United
07 Dec - 14 Dec	United
01 Dec - 14 Dec	United
29 Dec - 13 Jan	United
01 Dec - 22 Dec	United
09 Dec - 27 Dec	United
10 Dec - 29 Dec	United
08 Dec - 09 Jan	Hawaiian Airlines
01 Dec - 09 Dec	Asiana Airlines
09 Dec - 25 Dec	Hawaiian Airlines
09 Dec - 09 Jan	Hawaiian Airlines
06 Dec - 12 Dec	Air Canada
08 Dec - 08 Jan	Alaska Airlines
09 Dec - 16 Dec	jetBlue
11 Dec - 18 Jan	Delta
29 Dec - 20 Jan	Air India
30 Dec - 13 Jan	United
14 Dec - 13 Jan	Norse Atlantic Airways
24 Dec - 28 Jan	Sun Country Airlines
24 Dec - 14 Jan	United

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 849€

Return flights