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

Return flights

03 Dec - 07 Dec	jetBlue
01 Dec - 08 Dec	Delta
03 Dec - 10 Dec	Hawaiian Airlines
31 Dec - 31 Jan	American Airlines
02 Dec - 07 Dec	Frontier Airlines
09 Dec - 27 Dec	jetBlue
29 Dec - 20 Jan	Austrian Airlines
11 Dec - 13 Jan	Norse Atlantic Airways
30 Dec - 10 Jan	Delta
30 Dec - 13 Jan	Frontier Airlines
11 Dec - 14 Jan	Norse Atlantic Airways
11 Dec - 06 Jan	Sun Country Airlines
01 Dec - 31 Dec	Qatar Airways
29 Dec - 10 Jan	Air India
28 Dec - 14 Jan	Air India
07 Dec - 09 Jan	Delta
03 Dec - 30 Dec	Delta
09 Dec - 29 Dec	Delta
09 Dec - 31 Dec	Alaska Airlines
10 Dec - 24 Dec	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 $992

Return flights