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

Return flights

02 Sep - 07 Sep	Hawaiian Airlines
14 Sep - 21 Sep	United	direct
15 Sep - 22 Sep	United	direct
17 Sep - 24 Sep	United	direct
22 Sep - 29 Sep	United	direct
23 Sep - 30 Sep	United	direct
02 Sep - 09 Sep	United	direct
08 Sep - 15 Sep	United	direct
24 Sep - 01 Oct	United	direct
28 Sep - 05 Oct	United	direct
29 Sep - 06 Oct	United	direct
30 Sep - 07 Oct	United	direct
07 Sep - 16 Sep	United	direct
07 Sep - 14 Sep	United	direct
10 Sep - 19 Oct	United	direct
28 Sep - 15 Oct	Delta	direct
30 Sep - 10 Oct	United	direct
27 Sep - 14 Oct	United	direct
22 Sep - 06 Oct	United
16 Sep - 03 Oct	Delta	direct

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 592€

Return flights