AirHint found the following cheapest return flights from Los Angeles (LAX) to Sydney (SYD) in September 2025 (see full year).

Return flights

04 Sep - 14 Sep	Hawaiian Airlines
04 Sep - 07 Sep	Hawaiian Airlines
06 Sep - 21 Sep	Hawaiian Airlines
04 Sep - 21 Sep	Hawaiian Airlines
03 Sep - 17 Sep	Hawaiian Airlines
06 Sep - 19 Sep	Hawaiian Airlines
16 Sep - 23 Sep	Hawaiian Airlines
14 Sep - 28 Sep	Air Canada
13 Sep - 21 Sep	Hawaiian Airlines
01 Sep - 14 Sep	ANA
23 Sep - 07 Oct	Air Canada
26 Sep - 24 Oct	China Airlines
13 Sep - 11 Oct	Air Canada
12 Sep - 09 Oct	Air Canada
18 Sep - 04 Oct	Air Canada
12 Sep - 10 Oct	Air Canada
07 Sep - 04 Oct	Air Canada
18 Sep - 12 Oct	Air Canada
28 Sep - 06 Oct	Air Canada
28 Sep - 04 Oct	Air Canada

Also check the deals for one-way flights from Los Angeles 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.

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Cheapest return flights from Los Angeles to Sydney in September from 581€

Return flights