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

Return flights

10 Sep - 17 Sep	WestJet
03 Sep - 04 Oct	Porter Airlines (Canada) Ltd
15 Sep - 04 Oct	WestJet
05 Sep - 08 Sep	WestJet
04 Sep - 25 Oct	WestJet
09 Sep - 17 Sep	WestJet
04 Sep - 17 Sep	WestJet
04 Sep - 29 Sep	WestJet
09 Sep - 16 Sep	WestJet
30 Sep - 05 Oct	WestJet
09 Sep - 12 Sep	WestJet
20 Sep - 28 Sep	WestJet
05 Sep - 31 Oct	WestJet
05 Sep - 07 Oct	WestJet
14 Sep - 21 Sep	WestJet

Also check the deals for one-way flights from Hamilton 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 Hamilton to Sydney in September from $1522

Return flights