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

Return flights

01 Sep - 14 Sep	United
08 Sep - 15 Sep	United
10 Sep - 23 Sep	United
15 Sep - 22 Sep	United
23 Sep - 30 Sep	United
14 Sep - 15 Oct	United
22 Sep - 27 Sep	Air Canada
13 Sep - 15 Oct	Air Canada
25 Sep - 06 Oct	United
26 Sep - 06 Oct	United
12 Sep - 10 Oct	Air Canada
01 Sep - 12 Sep	Air Canada
13 Sep - 26 Sep	United

Also check the deals for one-way flights from Newark to Sydney in September.

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.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Cheapest return flights from Newark to Sydney in September from 827€

Return flights