AirHint found the following cheapest return flights from Las Vegas (LAS) to Sydney (SYD) in October 2025 (see full year).

Return flights

21 Oct - 04 Nov	Frontier Airlines
20 Oct - 29 Oct	Alaska Airlines
01 Oct - 05 Oct	Spirit Airlines
15 Oct - 29 Oct	Spirit Airlines
14 Oct - 29 Oct	Frontier Airlines
01 Oct - 15 Oct	Spirit Airlines
14 Oct - 21 Oct	Hawaiian Airlines
15 Oct - 22 Oct	Alaska Airlines
05 Oct - 19 Oct	Alaska Airlines
07 Oct - 21 Oct	Hawaiian Airlines
08 Oct - 22 Oct	Hawaiian Airlines

Also check the deals for one-way flights from Las Vegas 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 Las Vegas to Sydney in October from $1019

Return flights