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

Return flights

03 Sep - 07 Sep	Jetstar	direct
05 Sep - 12 Sep	Jetstar	direct
03 Sep - 10 Sep	Jetstar	direct
05 Sep - 14 Sep	Jetstar	direct
03 Sep - 14 Sep	Jetstar	direct
07 Sep - 17 Sep	Jetstar	direct
06 Sep - 16 Sep	Philippine Airlines
08 Sep - 15 Sep	United
04 Sep - 08 Sep	Asiana Airlines
05 Sep - 16 Sep	ANA

Also check the deals for one-way flights from Honolulu 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 Honolulu to Sydney in September from $280

Return flights