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

Return flights

03 Sep - 10 Sep	Hawaiian Airlines
10 Sep - 17 Oct	Alaska Airlines
13 Sep - 17 Oct	Hawaiian Airlines
03 Sep - 01 Oct	Qantas
08 Sep - 07 Oct	Qantas
07 Sep - 05 Oct	Qantas
07 Sep - 06 Oct	Qantas
09 Sep - 16 Sep	Qantas
08 Sep - 15 Sep	Qantas
10 Sep - 07 Oct	Qantas
01 Sep - 07 Sep	ANA
15 Sep - 22 Sep	ANA
28 Sep - 07 Oct	ANA
16 Sep - 27 Sep	Air Canada
27 Sep - 07 Oct	Qantas
27 Sep - 08 Oct	Qantas
14 Sep - 29 Sep	Air Canada
11 Sep - 15 Sep	Asiana Airlines
15 Sep - 29 Sep	Qantas
10 Sep - 28 Sep	Hawaiian Airlines

Also check the deals for one-way flights from New York 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.

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Cheapest return flights from New York to Sydney in September from 835€

Return flights