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

Return flights

20 Oct - 27 Oct	Delta
22 Oct - 29 Oct	Delta
28 Oct - 04 Nov	Delta
28 Oct - 09 Nov	Delta
29 Oct - 17 Nov	Delta
19 Oct - 03 Nov	Delta
27 Oct - 03 Nov	Delta
29 Oct - 10 Nov	Delta
19 Oct - 02 Nov	Delta
22 Oct - 30 Oct	Delta
30 Oct - 18 Nov	Delta
28 Oct - 31 Oct	Delta
22 Oct - 01 Nov	Delta
28 Oct - 22 Nov	Delta
24 Oct - 31 Oct	Delta
23 Oct - 30 Oct	Delta
23 Oct - 29 Oct	Frontier Airlines

Also check the deals for one-way flights from New York to Sydney in October.

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 October from 729€

Return flights