AirHint found the following cheapest one-way flights from San Francisco (SFO) to Sydney (SYD) in October 2025 (see full year).

One-Way flights

21 Oct	Alaska Airlines
23 Oct	Alaska Airlines
29 Oct	Alaska Airlines
15 Oct	Alaska Airlines
22 Oct	Alaska Airlines
18 Oct	Alaska Airlines
16 Oct	Alaska Airlines
25 Oct	Alaska Airlines
19 Oct	Alaska Airlines
26 Oct	Alaska Airlines

Also check the deals for return flights from San Francisco 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 one-way flights from San Francisco to Sydney in October from $417

One-Way flights