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

Return flights

10 Dec - 15 Dec	Air Canada
10 Dec - 17 Dec	Air Canada
11 Dec - 23 Dec	Air Canada
11 Dec - 17 Dec	Air Canada
08 Dec - 16 Dec	Air Canada
09 Dec - 16 Dec	Air Canada
09 Dec - 14 Dec	Air Canada
06 Dec - 17 Dec	Air Canada
23 Dec - 29 Dec	Air Canada
29 Dec - 26 Jan	Frontier Airlines
06 Dec - 09 Dec	Air Canada
30 Dec - 13 Jan	Spirit Airlines
09 Dec - 05 Jan	Spirit Airlines
25 Dec - 19 Jan	Porter Airlines (Canada) Ltd
29 Dec - 10 Jan	Frontier Airlines
27 Dec - 16 Jan	Air India
27 Dec - 17 Jan	Air India
11 Dec - 11 Jan	United
26 Dec - 11 Jan	United
26 Dec - 10 Jan	United

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 869€

Return flights