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

Return flights

09 Dec - 20 Jan	Air Canada
04 Dec - 14 Dec	Sun Country Airlines
05 Dec - 14 Dec	Sun Country Airlines
03 Dec - 14 Dec	Alaska Airlines
05 Dec - 15 Dec	jetBlue
09 Dec - 27 Dec	Air Canada
10 Dec - 17 Dec	Spirit Airlines
01 Dec - 12 Dec	Air Canada
06 Dec - 31 Dec	Air Canada
25 Dec - 16 Jan	Air Canada
24 Dec - 16 Jan	Air Canada
25 Dec - 13 Jan	Air Canada
27 Dec - 16 Jan	Air Canada
10 Dec - 29 Dec	Air Canada
31 Dec - 19 Jan	Air Canada
26 Dec - 16 Jan	Air Canada
10 Dec - 08 Jan	Hawaiian Airlines
10 Dec - 07 Jan	Hawaiian Airlines
24 Dec - 31 Dec	Air Canada
25 Dec - 08 Jan	Air Canada

Also check the deals for one-way flights from Newark 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 Newark to Sydney in December from $1064

Return flights