AirHint found the following cheapest return flights from San Francisco (SFO) to Sydney (SYD) in September 2026 (see full year).

Return flights

02 Sep - 09 Sep	Fiji Airways
04 Sep - 11 Sep	Fiji Airways
06 Sep - 13 Sep	Fiji Airways
01 Sep - 08 Sep	Philippine Airlines
15 Sep - 22 Sep	Philippine Airlines
24 Sep - 01 Oct	Philippine Airlines
09 Sep - 16 Sep	Fiji Airways
11 Sep - 20 Sep	Qantas	direct
11 Sep - 18 Sep	Cathay Pacific
01 Sep - 08 Sep	Qantas	direct
04 Sep - 11 Sep	Qantas	direct

Also check the deals for one-way flights from San Francisco to Sydney in September.

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 September from 687€

Return flights