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

Return flights

01 Dec - 08 Dec	Delta
08 Dec - 17 Jan	Alaska Airlines
03 Dec - 11 Dec	Hawaiian Airlines
09 Dec - 18 Jan	Frontier Airlines
03 Dec - 09 Dec	Hawaiian Airlines
04 Dec - 12 Dec	Air Canada
09 Dec - 22 Jan	Frontier Airlines
10 Dec - 17 Jan	Frontier Airlines
30 Dec - 14 Jan	Frontier Airlines
02 Dec - 10 Dec	ANA
08 Dec - 11 Jan	Frontier Airlines
02 Dec - 08 Dec	ANA
08 Dec - 16 Dec	Frontier Airlines
30 Dec - 13 Jan	Frontier Airlines
04 Dec - 14 Dec	Hawaiian Airlines
10 Dec - 21 Jan	Frontier Airlines
29 Dec - 11 Jan	Frontier Airlines
04 Dec - 10 Dec	Frontier Airlines
25 Dec - 15 Jan	Frontier Airlines
02 Dec - 09 Dec	ANA

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 729€

Return flights