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

Return flights

21 Oct - 28 Oct	United
22 Oct - 29 Oct	United
30 Oct - 12 Nov	United
20 Oct - 27 Oct	United
20 Oct - 31 Oct	United
29 Oct - 01 Nov	United
20 Oct - 02 Nov	United
26 Oct - 10 Nov	United
20 Oct - 24 Oct	United
20 Oct - 26 Oct	United
30 Oct - 18 Nov	Frontier Airlines
19 Oct - 08 Nov	United
31 Oct - 14 Nov	Frontier Airlines
21 Oct - 31 Oct	Frontier Airlines
30 Oct - 19 Nov	Spirit Airlines
29 Oct - 05 Nov	Air Canada
22 Oct - 11 Nov	Qantas
27 Oct - 31 Oct	United
24 Oct - 31 Oct	United

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 728€

Return flights