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

Return flights

21 Oct - 02 Nov	Alaska Airlines
20 Oct - 30 Oct	Philippine Airlines
20 Oct - 29 Oct	Philippine Airlines
20 Oct - 06 Nov	Philippine Airlines
21 Oct - 11 Nov	Philippine Airlines
25 Oct - 31 Oct	Philippine Airlines
27 Oct - 13 Nov	ANA
11 Oct - 22 Oct	Philippine Airlines
06 Oct - 22 Oct	Philippine Airlines
14 Oct - 26 Oct	ANA
04 Oct - 09 Oct	Philippine Airlines
05 Oct - 10 Oct	Fiji Airways
09 Oct - 22 Oct	Hawaiian Airlines
14 Oct - 26 Oct	Qantas	direct
21 Oct - 02 Nov	Qantas	direct
21 Oct - 11 Nov	Qantas	direct
01 Oct - 30 Nov	United	direct
27 Oct - 13 Nov	United	direct
20 Oct - 06 Nov	United	direct

Also check the deals for one-way 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 return flights from San Francisco to Sydney in October from 801€

Return flights