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

Return flights

29 Sep - 22 Oct	China Southern
18 Sep - 21 Sep	China Southern
16 Sep - 23 Sep	VietJet Air
23 Sep - 07 Oct	Air Canada
23 Sep - 30 Sep	VietJet Air
28 Sep - 13 Oct	Air Canada
28 Sep - 07 Oct	Air Canada
30 Sep - 10 Oct	Air Canada
25 Sep - 02 Oct	VietJet Air
16 Sep - 20 Sep	KLM
26 Sep - 01 Oct	VietJet Air
19 Sep - 26 Sep	VietJet Air
18 Sep - 11 Oct	Batik Air Malaysia
26 Sep - 10 Oct	VietJet Air
25 Sep - 23 Oct	Qatar Airways
18 Sep - 25 Sep	Cathay Pacific
25 Sep - 29 Sep	Air France

Also check the deals for one-way flights from Sydney to Amsterdam 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 Sydney to Amsterdam in September from 774€

Return flights