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

Return flights

07 Dec - 14 Dec	American Airlines
07 Dec - 22 Dec	Qantas
02 Dec - 05 Dec	Frontier Airlines
02 Dec - 06 Dec	Frontier Airlines
28 Dec - 28 Jan	American Airlines
29 Dec - 25 Jan	Qantas
02 Dec - 09 Dec	Korean Air
01 Dec - 14 Dec	Frontier Airlines
02 Dec - 28 Jan	Korean Air
10 Dec - 28 Dec	Delta
01 Dec - 07 Dec	Delta
11 Dec - 13 Jan	ANA
10 Dec - 27 Dec	Delta
16 Dec - 19 Jan	Frontier Airlines
08 Dec - 24 Dec	Frontier Airlines
30 Dec - 14 Jan	Air India
30 Dec - 13 Jan	Frontier Airlines
28 Dec - 14 Jan	Air India
29 Dec - 20 Jan	Air India
31 Dec - 12 Jan	Delta

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 916€

Return flights