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

Return flights

01 Dec - 14 Dec	United
25 Dec - 17 Jan	Air Canada
05 Dec - 15 Dec	United
04 Dec - 21 Dec	United
04 Dec - 15 Dec	United
27 Dec - 14 Jan	Air Canada
10 Dec - 19 Dec	United
11 Dec - 23 Dec	Air Canada
28 Dec - 17 Jan	Air Canada
09 Dec - 12 Dec	Air Canada
01 Dec - 06 Dec	Turkish Airlines
21 Dec - 11 Jan	Air Canada
14 Dec - 11 Jan	Air Canada
23 Dec - 11 Jan	Air Canada
24 Dec - 10 Jan	United
22 Dec - 29 Dec	United
24 Dec - 01 Jan	Air Canada
29 Dec - 05 Jan	United
28 Dec - 10 Jan	Turkish Airlines
14 Dec - 21 Dec	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 933€

Return flights