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

One-Way flights

09 Dec	Alaska Airlines
06 Dec	Alaska Airlines
08 Dec	Hawaiian Airlines
11 Dec	Sun Country Airlines
03 Dec	Alaska Airlines
13 Dec	Spirit Airlines
12 Dec	Alaska Airlines
10 Dec	Spirit Airlines
30 Dec	Delta
29 Dec	Lufthansa

Also check the deals for return 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 one-way flights from Newark to Sydney in December from $496

One-Way flights