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

Return flights

29 Oct - 09 Nov	Fiji Airways
24 Oct - 09 Nov	Fiji Airways
29 Oct - 05 Nov	Fiji Airways
14 Oct - 21 Oct	Philippine Airlines
25 Oct - 19 Nov	Alaska Airlines
02 Oct - 12 Oct	Air Canada
26 Oct - 11 Nov	Air Canada
26 Oct - 13 Nov	Air Canada
19 Oct - 03 Nov	Air Canada
30 Oct - 15 Nov	Air Canada
01 Oct - 12 Oct	Fiji Airways
01 Oct - 08 Oct	Fiji Airways
01 Oct - 02 Nov	Fiji Airways
17 Oct - 31 Oct	Fiji Airways
23 Oct - 30 Oct	Hawaiian Airlines
01 Oct - 14 Oct	Air Canada
03 Oct - 12 Oct	Philippine Airlines
07 Oct - 18 Oct	Philippine Airlines
09 Oct - 21 Oct	Alaska Airlines
26 Oct - 09 Nov	Qantas	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.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Cheapest return flights from San Francisco to Sydney in October from $848

Return flights